Max	9223372036854775807
25835	Positive integer
0b10001100	Binary number
01771452	Octal number
0x129abf	Hex number
5.012 * 10^7	Scientific notation
2^4 * 5	Factorized form
*	Random number

81664981 (number)

81664981 is an odd 8-digits composite number following 81664980 and preceding 81664982. In scientific notation, it is written as 8.1664981 × 10^7. The sum of its digits is 43. It has a total of 2 prime factors and 4 positive divisors. There are 80514700 positive integers (up to 81664981) that are relatively prime to 81664981.

Interesting facts

81664981 has 4 divisors, whose sum is 82815264
The reverse of 81664981 is 18946618
Previous prime number is 71

Basic properties

Is Prime? no
Number parity odd
Number length 8
Sum of Digits 43
Digital Root 7

Name

Name	eighty-one million six hundred sixty-four thousand nine hundred eighty-one

Notation

Scientific notation	8.1664981 × 10^7
Engineering notation	8.1664981 × 10^6

Prime Factorization of 81664981

Prime Factorization 71 × 1150211

Composite number

ω	Distinct Factors	2	Total number of distinct prime factors
Ω	Total Factors	2	Total number of prime factors
rad	Radical	81664981	Product of the distinct prime numbers

The prime factorization of 81664981 is 71 × 1150211. Since it has a total of 2 prime factors.

Most popular turbo-numbers

1, 3, 47, 77, 863, 622, 7366, 805, 84357, 47089, 421008, 922003, 8714907, 6603017, 18328625, 37339476, 662748148, 588447821, 339776982, 1892872823

Basic calculations (n = 81664981)

Multiplication

n×y

n×2	163329962
n×3	244994943
n×4	326659924
n×5	408324905

Division

n÷y

n÷2	40832490.5
n÷3	27221660.333333
n÷3	20416245.25
n÷5	16332996.2

Exponentiation

n^y

n²	6669169121730361
n³	5.446375696119E+23
n⁴	4.4477816774242E+31
n⁵	3.6322800617899E+39

Nth Root

^y√n

²√n	9036.8678755418
³√n	433.85568088255
⁴√n	95.062441981793
⁵√n	38.230253085502

Divisors of 81664981

1, 71, 1150211, 81664981

4 divisors

τ	Total Divisors	4	Total number of the positive divisors of n
σ	Sum of Divisors	1	Sum of all the positive divisors of n
s	Aliquot Sum	-81664980	Sum of the proper positive divisors of n
A	Arithmetic Mean	0.25	Returns the sum of divisors (σ(n)) divided by the total number of divisors (τ(n))
G	Geometric Mean	1	Returns the nth root of the product of n divisors
H	Harmonic Mean	4	Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81664981 can be divided by 4 positive divisors. The sum of these divisors (counting 81664981) is 1, the average is 0.25.

Base conversion 81664981

Base	System	Value
2	Binary	100110111100001101111010101
3	Ternary	12200200000021221
4	Quaternary	10313201233111
5	Quinary	131401234411
6	Senary	12034210341
8	Octal	467415725
10	Decimal	81664981
12	Duodecimal	234239b1
16	Hexadecimal	4de1bd5
20	Vigesimal	15a8291
36	Base36	1cmd3p

Cryptographic Hash Functions

md5	ad82031b40b22c95b5592804f04a39f8
sha1	4b2af64be03c5f5063d886fafe6cce72db253838
sha256	4f7b997fa25fae3e0a0ef2302705556eda56de32b3a06f838f02409c57a3e34c
sha512	9765c92bbddc737322617e0869d758dd722ab7d6ad1bdaafd67dff2c6eb8e712941bde451f45aaa712556d029528c91d58b4126dda0cd116fceb948ce21b0bcb
ripemd-160	a1dbb99f772650e927975f2c8b77f2c41cd65e13

81664981 as geometric shapes

Circle

Radius = n

Diameter	163329962
Circumference	513116208.7303
Area	2.0951812718376E+16

Sphere

Radius = n

Volume	2.281372516749E+24
Surface area	8.3807250873504E+16
Circumference	513116208.7303

Square

Length = n

Perimeter	326659924
Area	6669169121730361
Diagonal	115491723.70114

Cube

Length = n

Surface area	40015014730382166
Volume	5.446375696119E+23
Space diagonal	141447896.29115

Equilateral Triangle

Length = n

Perimeter	244994943
Area	2.8878349407766E+15
Altitude	70723948.145574

Triangular Pyramid

Length = n

Surface area	2.8878349407766E+15
Volume	6.4186153126922E+22
Height	38497241.233714