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

81649561 (number)

81649561 is an odd 8-digits composite number following 81649560 and preceding 81649562. In scientific notation, it is written as 8.1649561 × 10^7. The sum of its digits is 40. It has a total of 2 prime factors and 4 positive divisors. There are 68357520 positive integers (up to 81649561) that are relatively prime to 81649561.

Interesting facts

81649561 has 4 divisors, whose sum is 81921124
The reverse of 81649561 is 16594618
Previous prime number is 301

Basic properties

Is Prime? no
Number parity odd
Number length 8
Sum of Digits 40
Digital Root 4

Name

Name	eighty-one million six hundred forty-nine thousand five hundred sixty-one

Notation

Scientific notation	8.1649561 × 10^7
Engineering notation	8.1649561 × 10^6

Prime Factorization of 81649561

Prime Factorization 301 × 271261

Composite number

ω	Distinct Factors	2	Total number of distinct prime factors
Ω	Total Factors	2	Total number of prime factors
rad	Radical	81649561	Product of the distinct prime numbers

The prime factorization of 81649561 is 301 × 271261. Since it has a total of 2 prime factors.

Most popular turbo-numbers

1, 4, 67, 74, 473, 825, 7586, 7697, 33080, 6510, 560796, 911273, 2583603, 3021950, 61673676, 93693129, 564466023, 832194789, 2050142733, 9100594430

Basic calculations (n = 81649561)

Multiplication

n×y

n×2	163299122
n×3	244948683
n×4	326598244
n×5	408247805

Division

n÷y

n÷2	40824780.5
n÷3	27216520.333333
n÷3	20412390.25
n÷5	16329912.2

Exponentiation

n^y

n²	6666650811492721
n³	5.4432911209867E+23
n⁴	4.4444233042377E+31
n⁵	3.6288521168917E+39

Nth Root

^y√n

²√n	9036.0146635561
³√n	433.82837225473
⁴√n	95.057954236119
⁵√n	38.228809247457

Divisors of 81649561

1, 301, 271261, 81649561

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	-81649560	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 81649561 can be divided by 4 positive divisors. The sum of these divisors (counting 81649561) is 1, the average is 0.25.

Base conversion 81649561

Base	System	Value
2	Binary	100110111011101111110011001
3	Ternary	12200122020010211
4	Quaternary	10313131332121
5	Quinary	131400241221
6	Senary	12034011121
8	Octal	467357631
10	Decimal	81649561
12	Duodecimal	23416aa1
16	Hexadecimal	4dddf99
20	Vigesimal	15a63i1
36	Base36	1cm17d

Cryptographic Hash Functions

md5	71579173b7fd88e639ee0c0fd5bd2854
sha1	979eef65b806f119d49fdc34e23e0b18084b0f79
sha256	c51488bf34f4eb69697740d234ed50a908ea3a338edfb8e47ed03e93213538da
sha512	d0199818888c82535202b987eee4a19c616697b89ec9a81d87be285f52f120c72c417d47ad6b99ef4dbdb422eea3f09f43bca481d55b26086a9a6c36c5b79038
ripemd-160	25f3110fcf184d1a7f0015c34be6a0a615d14ab1

81649561 as geometric shapes

Circle

Radius = n

Diameter	163299122
Circumference	513019322.01286
Area	2.0943901213434E+16

Sphere

Radius = n

Volume	2.280080452939E+24
Surface area	8.3775604853736E+16
Circumference	513019322.01286

Square

Length = n

Perimeter	326598244
Area	6666650811492721
Diagonal	115469916.52801

Cube

Length = n

Surface area	39999904868956326
Volume	5.4432911209867E+23
Space diagonal	141421188.06769

Equilateral Triangle

Length = n

Perimeter	244948683
Area	2.8867444804564E+15
Altitude	70710594.033847

Triangular Pyramid

Length = n

Surface area	2.8867444804564E+15
Volume	6.4149801060371E+22
Height	38489972.176003