1991085655 is an odd 10-digits composite number following 1991085654
and preceding 1991085656 . In scientific notation, it is written as 1.991085655 × 10^9.
The sum of its digits is 49. It has a total of 4 prime factors and 16 positive divisors.
There are 1464606720 positive integers (up to 1991085655) that are relatively prime to 1991085655.
1991085655 has 16 divisors, whose sum is 2583129024
The reverse of 1991085655 is 5565801991
Previous prime number is 257
Is Prime? no Number parity odd Number length 10 Sum of Digits 49 Digital Root 4
Name
one billion nine hundred ninety-one million eighty-five thousand six hundred fifty-five
Scientific notation
1.991085655 × 10^9
Engineering notation
1.991085655 × 10^9
Prime Factorization
5 × 13 × 257 × 119191
Composite number
ω Distinct Factors
4 Total number of distinct prime factors
Ω Total Factors
4 Total number of prime factors
rad Radical
1991085655 Product of the distinct prime numbers
The prime factorization of 1991085655 is 5 × 13 × 257 × 119191.
Since it has a total of 4 prime factors.
9 , 9 , 36 , 70 , 518 , 430 , 3233 , 6410 , 98071 , 84782 , 855927 , 332307 , 9755292 , 8568483 , 86643012 , 54989747 , 555438786 , 558124599 , 536828569 , 3195001643
n×2
3982171310
n×3
5973256965
n×4
7964342620
n×5
9955428275
n÷2
995542827.5
n÷3
663695218.33333
n÷3
497771413.75
n÷5
398217131
n2
3964422085546779025
n3
7.8935039448974E+27
n4
1.5716642472371E+37
n5
3.1293181371502E+46
2 √n44621.582838353
3 √n1258.0463667159
4 √n211.23821348978
5 √n72.413241509017
1 , 5 , 13 , 65 , 257 , 1285 , 3341 , 16705 , 119191 , 595955 , 1549483 , 7747415 , 30632087 , 153160435 , 398217131 , 1991085655
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
-1991085654 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 1991085655 can be divided by 16 positive divisors.
The sum of these divisors (counting 1991085655) is 1, the average is 0.0625.
Base
System
Value
2
Binary
1110110101011011000111001010111
3
Ternary
12010202120122001011
4
Quaternary
1312223120321113
5
Quinary
13034204220110
6
Senary
525323513051
8
Octal
16653307127
10
Decimal
1991085655
12
Duodecimal
476988787
16
Hexadecimal
76ad8e57
20
Vigesimal
1b245e2f
36
Base36
wxfviv
md5
bf361571d77f6775976cf7b464d7cb25
sha1
4479f3debc283361a20dfcb2f69916bcdf9f5cc0
sha256
039fa57b41875a48ea3d53095c091a3c13d86e9407a6dd5234e803eab3891e09
sha512
0d8a57467dec2fdd08c6ef1f2832ec4160f0f0b70ad8a3a32c1e032fbaef97106393493d1a4501d662b3983adda80a77066202256c0e325724ecd7f88e8244c0
ripemd-160
ff2f6978f52e14125bb6e01cb89a547fe3324f03
Diameter
3982171310
Circumference
12510360132.832
Area
1.2454599299683E+19
Volume
3.3064232005829E+28
Surface area
4.9818397198732E+19
Circumference
12510360132.832
Perimeter
7964342620
Area
3964422085546779025
Diagonal
2815820337.1475
Surface area
2.3786532513281E+19
Volume
7.8935039448974E+27
Space diagonal
3448661516.6816
Perimeter
5973256965
Area
1.7166451187038E+18
Altitude
1724330758.3408
Surface area
1.7166451187038E+18
Volume
9.3025836112662E+26
Height
938606779.04917