25105295136 has 24 divisors (see below), whose sum is σ = 65901399984. Its totient is φ = 8368431680.

The previous prime is 25105295123. The next prime is 25105295141. The reversal of 25105295136 is 63159250152.

It is a tau number, because it is divible by the number of its divisors (24).

It is a junction number, because it is equal to n+sod(n) for n = 25105295094 and 25105295103.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 130756650 + ... + 130756841.

It is an arithmetic number, because the mean of its divisors is an integer number (2745891666).

Almost surely, 2^25105295136 is an apocalyptic number.

It is an amenable number.

25105295136 is an abundant number, since it is smaller than the sum of its proper divisors (40796104848).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25105295136 is a wasteful number, since it uses less digits than its factorization.

25105295136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261513504 (or 261513496 counting only the distinct ones).

The product of its (nonzero) digits is 81000, while the sum is 39.

The spelling of 25105295136 in words is "twenty-five billion, one hundred five million, two hundred ninety-five thousand, one hundred thirty-six".