81777978 is an even 8-digits composite number following 81777977
and preceding 81777979 . In scientific notation, it is written as 8.1777978 × 10^7.
The sum of its digits is 54. It has a total of 4 prime factors and 16 positive divisors.
There are 27259308 positive integers (up to 81777978) that are relatively prime to 81777978.
81777978 has 16 divisors, whose sum is 181728960
The reverse of 81777978 is 87977718
Previous prime number is 9
Is Prime? no
Number parity even
Number length 8
Sum of Digits 54
Digital Root 9
Name
eighty-one million seven hundred seventy-seven thousand nine hundred seventy-eight
Scientific notation
8.1777978 × 10^7
Engineering notation
8.1777978 × 10^6
Prime Factorization
2 × 3 × 9 × 1514407
Composite number
ω
Distinct Factors
4
Total number of distinct prime factors
Ω
Total Factors
4
Total number of prime factors
rad
Radical
81777978
Product of the distinct prime numbers
The prime factorization of 81777978 is 2 × 3 × 9 × 1514407.
Since it has a total of 4 prime factors.
10 , 9 , 12 , 8 , 329 , 803 , 3574 , 7975 , 66202 , 17229 , 213762 , 960840 , 401791 , 5388453 , 7922204 , 21317903 , 18333170 , 599013193 , 5242172364 , 6734003136
n×2
163555956
n×3
245333934
n×4
327111912
n×5
408889890
n÷2
40888989
n÷3
27259326
n÷3
20444494.5
n÷5
16355595.6
n2
6687637685768484
n3
5.4690148753875E+23
n4
4.4724497816111E+31
n5
3.657478998467E+39
2 √n
9043.1177145938
3 √n
434.0556923441
4 √n
95.095308583514
5 √n
38.240826809802
1 , 2 , 3 , 6 , 9 , 18 , 27 , 54 , 1514407 , 3028814 , 4543221 , 9086442 , 13629663 , 27259326 , 40888989 , 81777978
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
-81777977
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 81777978 can be divided by 16 positive divisors.
The sum of these divisors (counting 81777978) is 1, the average is 0.0625.
Base
System
Value
2
Binary
100110111111101010100111010
3
Ternary
12200212202022000
4
Quaternary
10313331110322
5
Quinary
131413343403
6
Senary
12040441430
8
Octal
467752472
10
Decimal
81777978
12
Duodecimal
23479276
16
Hexadecimal
4dfd53a
20
Vigesimal
15b24ii
36
Base36
1cosai
md5
a0a3d07b2742b15fe4772b7edf5f61cf
sha1
9dde928cedaa2267a6ae116106e27f66ed2b76cb
sha256
a708bc90374e00c4fc3225fa905f373c09f8ff7003cedb08c97242ff0d0743b0
sha512
01910ed21271dc4c45d34d4a1c5470f6b0c9b7b0f06a76b85f07c23f6785374619a35d4a337c9efe9d552b05ca2c58c72000a0d8593be3ee7d5d58c35a3ce0ec
ripemd-160
8f958415dd1e344e32bdab83b9d0b0aa3f160549
Diameter
163555956
Circumference
513826189.82046
Area
2.1009833423481E+16
Volume
2.2908555939854E+24
Surface area
8.4039333693922E+16
Circumference
513826189.82046
Perimeter
327111912
Area
6687637685768484
Diagonal
115651525.59105
Surface area
40125826114610904
Volume
5.4690148753875E+23
Space diagonal
141643612.83625
Perimeter
245333934
Area
2.8958320635908E+15
Altitude
70821806.418125
Surface area
2.8958320635908E+15
Volume
6.4452958413276E+22
Height
38550508.53035