25138913764 has 12 divisors (see below), whose sum is σ = 44185210300. Its totient is φ = 12514567968.

The previous prime is 25138913749. The next prime is 25138913771. The reversal of 25138913764 is 46731983152.

It can be written as a sum of positive squares in 2 ways, for example, as 23857273764 + 1281640000 = 154458^2 + 35800^2 .

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

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, 13721199 + ... + 13723030.

Almost surely, 2^25138913764 is an apocalyptic number.

It is an amenable number.

25138913764 is a deficient number, since it is larger than the sum of its proper divisors (19046296536).

25138913764 is a wasteful number, since it uses less digits than its factorization.

25138913764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27444462 (or 27444460 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 49.

The spelling of 25138913764 in words is "twenty-five billion, one hundred thirty-eight million, nine hundred thirteen thousand, seven hundred sixty-four".