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10128991171 = 13259934859
BaseRepresentation
bin10010110111011110…
…00010001111000011
3222010220111001202011
421123233002033003
5131221010204141
64353031233351
7506002001335
oct113357021703
928126431664
1010128991171
114328607a92
121b68218857
13c55641a00
146c133d455
153e438c881
hex25bbc23c3

10128991171 has 6 divisors (see below), whose sum is σ = 10968079380. Its totient is φ = 9349837848.

The previous prime is 10128991157. The next prime is 10128991189. The reversal of 10128991171 is 17119982101.

10128991171 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 10128991171 - 25 = 10128991139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10128991111) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 29967261 + ... + 29967598.

It is an arithmetic number, because the mean of its divisors is an integer number (1828013230).

Almost surely, 210128991171 is an apocalyptic number.

10128991171 is a deficient number, since it is larger than the sum of its proper divisors (839088209).

10128991171 is an equidigital number, since it uses as much as digits as its factorization.

10128991171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59934885 (or 59934872 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 40.

The spelling of 10128991171 in words is "ten billion, one hundred twenty-eight million, nine hundred ninety-one thousand, one hundred seventy-one".

Divisors: 1 13 169 59934859 779153167 10128991171