81644981 (number)

81644981 is an odd 8-digits composite number following 81644980 and preceding 81644982. In scientific notation, it is written as 8.1644981 × 10^7. The sum of its digits is 41. It has a total of 3 prime factors and 8 positive divisors. There are 72412000 positive integers (up to 81644981) that are relatively prime to 81644981.

Interesting facts

Basic properties

Name

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

Notation

Scientific notation 8.1644981 × 10^7
Engineering notation 8.1644981 × 10^6

Prime Factorization of 81644981

Prime Factorization 41 × 11 × 181031

Composite number
ω Distinct Factors 3
Total number of distinct prime factors
Ω Total Factors 3
Total number of prime factors
rad Radical 81644981
Product of the distinct prime numbers

The prime factorization of 81644981 is 41 × 11 × 181031. Since it has a total of 3 prime factors.

Most popular turbo-numbers

Basic calculations (n = 81644981)

Multiplication

n×y
n×2 163289962
n×3 244934943
n×4 326579924
n×5 408224905

Division

n÷y
n÷2 40822490.5
n÷3 27214993.666667
n÷3 20411245.25
n÷5 16328996.2

Exponentiation

ny
n2 6665902922490361
n3 5.4423751745457E+23
n4 4.4434261772066E+31
n5 3.6278344581293E+39

Nth Root

y√n
2√n 9035.7612296917
3√n 433.82026046955
4√n 95.056621177547
5√n 38.228380361196

Divisors of 81644981

8 divisors

τ Total Divisors 8
Total number of the positive divisors of n
σ Sum of Divisors 1
Sum of all the positive divisors of n
s Aliquot Sum -81644980
Sum of the proper positive divisors of n
A Arithmetic Mean 0.125
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 8
Returns the total number of divisors (τ(n)) divided by the sum of the reciprocal of each divisors

The number 81644981 can be divided by 8 positive divisors. The sum of these divisors (counting 81644981) is 1, the average is 0.125.

Base conversion 81644981

Base System Value
2 Binary 100110111011100110110110101
3 Ternary 12200121222212012
4 Quaternary 10313130312311
5 Quinary 131400114411
6 Senary 12033534005
8 Octal 467346665
10 Decimal 81644981
12 Duodecimal 23414305
16 Hexadecimal 4ddcdb5
20 Vigesimal 15a5c91
36 Base36 1clxo5

Cryptographic Hash Functions

md5 d65f668b4ff6ac1b40562b0c5602e887
sha1 c5889211cb23479b2e65f44f450df0d79b8798e5
sha256 8f30f318f7be981900de04aaa69db9ba5d7cd6a0187913e40eedfe8f7b7299f3
sha512 f11f1f0e33c7bca19b739622f50ab9b43111a07ec187f142646d5e9db17f04e4713edc9c5f4c09650981abb131d3f40610050996551fa23dd4f304868fb1ae9b
ripemd-160 6ee382702394bda7562b6979ae1406d5d2d67950

81644981 as geometric shapes

Circle

Radius = n
Diameter 163289962
Circumference 512990545.02416
Area 2.0941551650838E+16

Sphere

Radius = n
Volume 2.279696782191E+24
Surface area 8.3766206603354E+16
Circumference 512990545.02416

Square

Length = n
Perimeter 326579924
Area 6665902922490361
Diagonal 115463439.42989

Cube

Length = n
Surface area 39995417534942166
Volume 5.4423751745457E+23
Space diagonal 141413255.275

Equilateral Triangle

Length = n
Perimeter 244934943
Area 2.8864206350188E+15
Altitude 70706627.637498

Triangular Pyramid

Length = n
Surface area 2.8864206350188E+15
Volume 6.4139006528043E+22
Height 38487813.143298