81661594 is an even 8-digits composite number following 81661593
and preceding 81661595 . In scientific notation, it is written as 8.1661594 × 10^7.
The sum of its digits is 40. It has a total of 4 prime factors and 16 positive divisors.
There are 34604064 positive integers (up to 81661594) that are relatively prime to 81661594.
81661594 has 16 divisors, whose sum is 141566400
The reverse of 81661594 is 49516618
Previous prime number is 89
Is Prime? no
Number parity even
Number length 8
Sum of Digits 40
Digital Root 4
Name
eighty-one million six hundred sixty-one thousand five hundred ninety-four
Scientific notation
8.1661594 × 10^7
Engineering notation
8.1661594 × 10^6
Prime Factorization
2 × 7 × 89 × 65539
Composite number
ω
Distinct Factors
4
Total number of distinct prime factors
Ω
Total Factors
4
Total number of prime factors
rad
Radical
81661594
Product of the distinct prime numbers
The prime factorization of 81661594 is 2 × 7 × 89 × 65539.
Since it has a total of 4 prime factors.
10 , 4 , 78 , 52 , 114 , 548 , 6933 , 5171 , 44964 , 8228 , 555827 , 710234 , 1544898 , 1290085 , 37826094 , 42268552 , 416058300 , 519035589 , 5151688806 , 8729372820
n×2
163323188
n×3
244984782
n×4
326646376
n×5
408307970
n÷2
40830797
n÷3
27220531.333333
n÷3
20415398.5
n÷5
16332318.8
n2
6668615934620836
n3
5.4456980699494E+23
n4
4.4470438483479E+31
n5
3.6315268924398E+39
2 √n
9036.6804745991
3 √n
433.84968284239
4 √n
95.061456303799
5 √n
38.229935965449
1 , 2 , 7 , 14 , 89 , 178 , 623 , 1246 , 65539 , 131078 , 458773 , 917546 , 5832971 , 11665942 , 40830797 , 81661594
16 divisors
τ
Total Divisors
16
Total number of the positive divisors of n
σ
Sum of Divisors
1
Sum of all the positive divisors of n
s
Aliquot Sum
-81661593
Sum of the proper positive divisors of n
A
Arithmetic Mean
0.0625
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
16
Returns the total number of divisors (τ(n )) divided by the sum of the reciprocal of each divisors
The number 81661594 can be divided by 16 positive divisors.
The sum of these divisors (counting 81661594) is 1, the average is 0.0625.
Base
System
Value
2
Binary
100110111100000111010011010
3
Ternary
12200122211122111
4
Quaternary
10313200322122
5
Quinary
131401132334
6
Senary
12034142534
8
Octal
467407232
10
Decimal
81661594
12
Duodecimal
23421a4a
16
Hexadecimal
4de0e9a
20
Vigesimal
15a7dje
36
Base36
1cmahm
md5
a91a2a02f09c4093f6c63e2e548fd3d0
sha1
1acbc5dde69aad240a1745ee7b384c93607a885f
sha256
883e6f09118f19aee23e7bb8021faaaade006118a0c8d6e445d04ababc999ff8
sha512
80458a9393b02891296ef5fcd53adc745f97b26c63c84723819e175bc19faca9ebd017391f4346502c723b0466430028177aa6032c96f038a00afe954582bac6
ripemd-160
6792426a6c23f267c2bab972687976bb889141d1
Diameter
163323188
Circumference
513094927.58166
Area
2.0950074829817E+16
Volume
2.2810886733628E+24
Surface area
8.3800299319267E+16
Circumference
513094927.58166
Perimeter
326646376
Area
6668615934620836
Diagonal
115486933.75981
Surface area
40011695607725016
Volume
5.4456980699494E+23
Space diagonal
141442029.83506
Perimeter
244984782
Area
2.8875954037317E+15
Altitude
70721014.917531
Surface area
2.8875954037317E+15
Volume
6.4178167225928E+22
Height
38495644.586602