Number: 61

Facts about the number: 61 is the code for international direct dial phone calls to Australia. 61 is the number of points required to win a "standard" game of Cribbage. 61 is the 18th prime number. 61 is the sum of two squares, 52 + 62, and it is also a centered square number, a centered hexagonal number and a centered decagonal number. 61 is 9th Mersenne Prime Exponent. 61 is the 3^{rd} secant number.
The number of digits in the number: \( n \): \( d = \lfloor \log_{10}(n) \rfloor + 1 \)	2
Sum of the digits: \( n \): \( S = \sum_{i=1}^{k} d_i \)	7
Reverse number: \( \text{Reverse}(n) = \sum_{i=1}^{k} d_i \cdot 10^{k-i} \)	0.016393442622951
Binary number system: \( n = \sum_{i=0}^{k-1} d_i \cdot 2^i \)	1011111111111
Hexadecimal number system: \( n = \sum_{i=0}^{k-1} d_i \cdot 16^i \)	17ff
Parity of the number: \( \text{Parity}(n) = n \mod 2 \)	odd
Simplicity of the number: \(\text{IsPrime}(n) = n > 1 \land \forall d \in [2, \sqrt{n}], n \mod d \neq 0\)	true
The square root: \(\sqrt{n} = n^{\frac{1}{2}}\)	7.8102496759067
The factorial of the number: \( n!=n \times (n-1) \times (n-2) \times \ldots \times 2 \times 1 \)	5.0758021387722E+83
The sign of the number: \(\text{sign}(n) = \begin{cases} 1, & \text{if } n>0 \ 0, & \text{if } n=0 \ -1, & \text{if } n<0 \end{cases}\)	+
The nearest multiple of 10: \(\text{10}(n) = 10 \times \left\lfloor \frac{n + 5}{10} \right\rfloor\)	0
The nearest multiple of 100: \(\text{100}(n) = 100 \times \left\lfloor \frac{n + 50}{100} \right\rfloor\)	0
Sine: \(\sin(x) = \sum_{n=0}^{\infty} \frac{(-1)^n x^{2n+1}}{(2n+1)!}\)	-0.96611777000839
Cosine: \(\cos(x) = \sum_{n=0}^{\infty} \frac{(-1)^n x^{2n}}{(2n)!}\)	-0.25810163593827
Tangent: \(\tan(x) = \sum_{n=0}^{\infty} \frac{(-1)^n 2^{2n} (2^{2n} - 1) B_{2n} x^{2n-1}}{(2n)!}\)	3.7431679442724
The square of the number: \(\text{square}(n) = n^2\)	3721
Cubic root: \(\text{}(n) = \sqrt[3]{n}\)	3.9364971831022
Natural logarithm: \(\ln(ab) = \ln(a) + \ln(b)\)	4.1108738641733
Common logarithm: \(\log_{10}(ab) = \log_{10}(a) + \log_{10}(b)\)	1.7853298350108
All divisors of a number: \( D(n) = \{ d \in \mathbb{Z}^+ : n \mod d = 0 \} \)	1, 61
Base64:	NjEuNDM=
SHA1:	49ee9241c40890fde560f7f82f34e6381e00e24c
MD5:	47b2621e4c9c70c64d4a17faa42498f1
Converts a number to a Roman representation:	LXI
Converting the number of seconds to days, hours, minutes and seconds:	days: 0, hours: 0, minutes: 1, seconds: 1.
Converts a number to a date in UNIX time format:
	Chinese:	1970 月 1 星期四
	Spanish:	1970 Enero 1 Jueves
	English:	1970 January 1 Thursday
	Hindi:	1970 जनवरी 1 गुरुवार
	Arab:	1970 يناير 1 الخميس
	Bengal:	1970 জানুয়ারী 1 বৃহস্পতিবার
	Portuguese:	1970 Janeiro 1 Quinta-feira
	Russian:	1970 Январь 1 Четверг
	Japanese:	1970 一月 1 木曜日
	Lahnda:	1970 جنوری 1 جمعرات
	Marathi:	1970 जानेवारी 1 गुरुवार
	Telugu:	1970 జనవరి 1 గురువారం
	Malay:	1970 Januari 1 Khamis
	Turkish:	1970 Ocak 1 Perşembe
	Korean:	1970 1월 1 목요일
	French:	1970 Janvier 1 Jeudi
	German:	1970 Januar 1 Donnerstag
	Vietnamese:	1970 Tháng Một 1 Thứ năm
	Tamil:	1970 ஜனவரி 1 வியாழக்கிழமை
	Urdu:	1970 جنوری 1 جمعرات
	Javanese:	1970 Januari 1 Kemis
	Italian:	1970 Gennaio 1 Giovedì
	Persian:	1970 ژانویه 1 پنج‌شنبه
	Gujaratis:	1970 જાન્યુઆરી 1 ગુરુવાર
Length:
	61 kilometers = 61,000.00 meters
	61 miles = 98,169.74 meters
	61 feet = 18.59 meters
	61 inches = 1.55 meters
	61 yards = 55.78 meters
	61 meters = 0.06 kilometers
	61 meters = 0.04 miles
	61 meters = 200.13 feet
	61 meters = 2,401.57 inches
	61 meters = 66.71 yards
Weight:
	61 pounds = 27.67 kilograms
	61 grams = 0.06 kilograms
	61 ounces = 1.73 kilograms
	61 tons = 55,338.29 kilograms
	61 kilograms = 134.48 pounds
	61 kilograms = 61,000.00 grams
	61 kilograms = 2,151.71 ounces
	61 kilograms = 0.07 tons
Volume:
	61 gallons = 230.91 liters
	61 milliliters = 0.06 liters
	61 cubic meters = 61,000.00 liters
	61 liters = 16.11 gallons
	61 liters = 61,000.00 milliliters
	61 liters = 0.06 cubic meters
Area:
	61 acres = 246,858.46 square meters
	61 hectares = 610,000.00 square meters
	61 square feet = 5.67 square meters
	61 square inches = 0.04 square meters
	61 square meters = 0.02 acres
	61 square meters = 0.01 hectares
	61 square meters = 656.60 square feet
	61 square meters = 94,550.19 square inches
Temperature:
	61 celsius = 141.80 fahrenheit
	61 celsius = 334.15 kelvin
	61 fahrenheit = 16.11 celsius
	61 fahrenheit = 289.26 kelvin
	61 kelvin = -212.15 celsius
	61 kelvin = -349.87 fahrenheit
Time:
	61 seconds = 1.02 minutes
	61 seconds = 0.02 hours
	61 seconds = 0.00 days
	61 minutes = 3,660.00 seconds
	61 minutes = 1.02 hours
	61 minutes = 0.04 days
	61 hours = 219,600.00 seconds
	61 hours = 3,660.00 minutes
	61 hours = 2.54 days
	61 days = 5,270,400.00 seconds
	61 days = 87,840.00 minutes
	61 days = 1,464.00 hours
Energy:
	61 joules = 14.58 calories
	61 joules = 0.06 kilojoules
	61 joules = 0.02 watt hours
	61 calories = 255.22 joules
	61 calories = 0.26 kilojoules
	61 kilojoules = 61,000.00 joules
	61 kilojoules = 14,579.37 calories
	61 watt hours = 219,600.00 joules
	61 watt hours = 219.60 kilojoules
Information:
	61 bytes = 0.06 kilobytes
	61 kilobytes = 62,464.00 bytes
	61 kilobytes = 0.06 megabytes
	61 megabytes = 62,464.00 kilobytes
	61 megabytes = 0.06 gigabytes
	61 gigabytes = 62,464.00 megabytes
	61 gigabytes = 0.06 terabytes
	61 terabytes = 62,464.00 gigabytes