12638138888825 has 12 divisors (see below), whose sum is σ = 16496097076560. Its totient is φ = 9578378946960.

The previous prime is 12638138888819. The next prime is 12638138888833. The reversal of 12638138888825 is 52888883183621.

It is a de Polignac number, because none of the positive numbers 2^k-12638138888825 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13303303619 + ... + 13303304568.

It is an arithmetic number, because the mean of its divisors is an integer number (1374674756380).

Almost surely, 2^{12638138888825} is an apocalyptic number.

It is an amenable number.

12638138888825 is a deficient number, since it is larger than the sum of its proper divisors (3857958187735).

12638138888825 is a wasteful number, since it uses less digits than its factorization.

12638138888825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26606608216 (or 26606608211 counting only the distinct ones).

The product of its digits is 283115520, while the sum is 71.

The spelling of 12638138888825 in words is "twelve trillion, six hundred thirty-eight billion, one hundred thirty-eight million, eight hundred eighty-eight thousand, eight hundred twenty-five".