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

81491661 (number)

81491661 is an odd 8-digits composite number following 81491660 and preceding 81491662. In scientific notation, it is written as 8.1491661 × 10^7. The sum of its digits is 36. It has a total of 2 prime factors and 4 positive divisors. There are 54327768 positive integers (up to 81491661) that are relatively prime to 81491661.

Interesting facts

81491661 has 4 divisors, whose sum is 90546300
The reverse of 81491661 is 16619418
Previous prime number is 9

Basic properties

Is Prime? no
Number parity odd
Number length 8
Sum of Digits 36
Digital Root 9

Name

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

Notation

Scientific notation	8.1491661 × 10^7
Engineering notation	8.1491661 × 10^6

Prime Factorization of 81491661

Prime Factorization 9 × 9054629

Composite number

ω	Distinct Factors	2	Total number of distinct prime factors
Ω	Total Factors	2	Total number of prime factors
rad	Radical	81491661	Product of the distinct prime numbers

The prime factorization of 81491661 is 9 × 9054629. Since it has a total of 2 prime factors.

Most popular turbo-numbers

5, 8, 12, 3, 365, 324, 7112, 2577, 97049, 72877, 802489, 457074, 7421567, 1085110, 17251256, 50139808, 507783168, 454719219, 2723929941, 4585737991

Basic calculations (n = 81491661)

Multiplication

n×y

n×2	162983322
n×3	244474983
n×4	325966644
n×5	407458305

Division

n÷y

n÷2	40745830.5
n÷3	27163887
n÷3	20372915.25
n÷5	16298332.2

Exponentiation

n^y

n²	6640890812538921
n³	5.4117722283344E+23
n⁴	4.4101430784064E+31
n⁵	3.5938988470699E+39

Nth Root

^y√n

²√n	9027.2731763252
³√n	433.5485352521
⁴√n	95.011963332652
⁵√n	38.214011853001

Divisors of 81491661

1, 9, 9054629, 81491661

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	-81491660	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 81491661 can be divided by 4 positive divisors. The sum of these divisors (counting 81491661) is 1, the average is 0.25.

Base conversion 81491661

Base	System	Value
2	Binary	100110110110111011011001101
3	Ternary	12200100012112200
4	Quaternary	10312313123031
5	Quinary	131330213121
6	Senary	12030352113
8	Octal	466673315
10	Decimal	81491661
12	Duodecimal	2335b639
16	Hexadecimal	4db76cd
20	Vigesimal	1596931
36	Base36	1cind9

Cryptographic Hash Functions

md5	f96cf2a2adc003988870ddb494fbef9a
sha1	73185818540bed3e14b6f7ded6f4700cccc440b2
sha256	8553959920bfa7a96f563a5bc8eefae796dac44115e006ea8d6b403f747d285c
sha512	5bc37ee59952cf1d850011b28c3ff95171fcf452910ccaaa6a53bdc94d669172bc7deb60efc9348d47766632e08bdc3eb744c299d70c626f0edb355993c02d1a
ripemd-160	ae99d77680749b2c2bdc3952075a6d7f58403045

81491661 as geometric shapes

Circle

Radius = n

Diameter	162983322
Circumference	512027207.05286
Area	2.0862973789964E+16

Sphere

Radius = n

Volume	2.2668778500582E+24
Surface area	8.3451895159857E+16
Circumference	512027207.05286

Square

Length = n

Perimeter	325966644
Area	6640890812538921
Diagonal	115246612.20651

Cube

Length = n

Surface area	39845344875233526
Volume	5.4117722283344E+23
Space diagonal	141147697.24518

Equilateral Triangle

Length = n

Perimeter	244474983
Area	2.8755900737087E+15
Altitude	70573848.62259

Triangular Pyramid

Length = n

Surface area	2.8755900737087E+15
Volume	6.3778347348204E+22
Height	38415537.40217