25139128764 has 12 divisors (see below), whose sum is σ = 58657967144. Its totient is φ = 8379709584.

The previous prime is 25139128717. The next prime is 25139128787. The reversal of 25139128764 is 46782193152.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1047463687 + ... + 1047463710.

Almost surely, 2^25139128764 is an apocalyptic number.

It is an amenable number.

25139128764 is an abundant number, since it is smaller than the sum of its proper divisors (33518838380).

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

25139128764 is a wasteful number, since it uses less digits than its factorization.

25139128764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2094927404 (or 2094927402 counting only the distinct ones).

The product of its digits is 725760, while the sum is 48.

The spelling of 25139128764 in words is "twenty-five billion, one hundred thirty-nine million, one hundred twenty-eight thousand, seven hundred sixty-four".