81664749 (number)

81664749 is an odd 8-digits composite number following 81664748 and preceding 81664750. In scientific notation, it is written as 8.1664749 × 10^7. The sum of its digits is 45. It has a total of 4 prime factors and 12 positive divisors. There are 53753544 positive integers (up to 81664749) that are relatively prime to 81664749.

Interesting facts

Basic properties

Name

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

Notation

Scientific notation 8.1664749 × 10^7
Engineering notation 8.1664749 × 10^6

Prime Factorization of 81664749

Prime Factorization 3 × 3 × 79 × 114859

Composite number
ω Distinct Factors 3
Total number of distinct prime factors
Ω Total Factors 4
Total number of prime factors
rad Radical 27221583
Product of the distinct prime numbers

The prime factorization of 81664749 is 3 × 3 × 79 × 114859. Since it has a total of 4 prime factors.

Most popular turbo-numbers

8, 10, 76, 10, 415, 727, 4033, 6291, 4441, 82757, 312099, 86817, 6289152, 4070052, 73871517, 58778865, 696036251, 94168338, 8898109675, 8674668954

Basic calculations (n = 81664749)

Multiplication

n×y
n×2 163329498
n×3 244994247
n×4 326658996
n×5 408323745

Division

n÷y
n÷2 40832374.5
n÷3 27221583
n÷3 20416187.25
n÷5 16332949.8

Exponentiation

ny
n2 6669131229233001
n3 5.4463292788337E+23
n4 4.4477311352731E+31
n5 3.6322284678156E+39

Nth Root

y√n
2√n 9036.8550392269
3√n 433.85527003891
4√n 95.062374466594
5√n 38.230231364003

Divisors of 81664749

1, 3, 9, 79, 237, 711, 114859, 344577, 1033731, 9073861, 27221583, 81664749

12 divisors

τ Total Divisors 12
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -81664748
Sum of the proper positive divisors of n
A Arithmetic Mean 0.083333333333333
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 12
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81664749 can be divided by 12 positive divisors. The sum of these divisors (counting 81664749) is 1, the average is 0.083333333333333.

Base conversion 81664749

Base System Value
2 Binary 100110111100001101011101101
3 Ternary 12200122222222100
4 Quaternary 10313201223231
5 Quinary 131401232444
6 Senary 12034205313
8 Octal 467415355
10 Decimal 81664749
12 Duodecimal 23423839
16 Hexadecimal 4de1aed
20 Vigesimal 15a81h9
36 Base36 1cmcx9

Cryptographic Hash Functions

md5 1b12953d660d49cf3513232e8ffa7e95
sha1 f662cd3384891e10432c5ca0528f35c83cbe9a2c
sha256 2989cbaeb711522d8a25c87158514fe68567c7641d030348b8eb4e6049ca5afe
sha512 45018d0abbc9138169b4e4d04b5532676a2362baa4fb8be111f4c543339ba4464ad6cd9115daf4f09872896862604e00bd71a90a6e65afa71e465e9c70ab3241
ripemd-160 96dbcb4dbb36a8782d2c2b45cbacdad5a1dcbc25

81664749 as geometric shapes

Circle

Radius = n
Diameter 163329498
Circumference 513114751.03131
Area 2.0951693675585E+16

Sphere

Radius = n
Volume 2.281353073522E+24
Surface area 8.3806774702339E+16
Circumference 513114751.03131

Square

Length = n
Perimeter 326658996
Area 6669131229233001
Diagonal 115491395.60359

Cube

Length = n
Surface area 40014787375398006
Volume 5.4463292788337E+23
Space diagonal 141447494.45536

Equilateral Triangle

Length = n
Perimeter 244994247
Area 2.887818532844E+15
Altitude 70723747.22768

Triangular Pyramid

Length = n
Surface area 2.887818532844E+15
Volume 6.418560609397E+22
Height 38497131.867865