12638902638764 has 24 divisors (see below), whose sum is σ = 22520381065728. Its totient is φ = 6205114610640.

The previous prime is 12638902638757. The next prime is 12638902638773. The reversal of 12638902638764 is 46783620983621.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 12638902638764.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75736724 + ... + 75903419.

It is an arithmetic number, because the mean of its divisors is an integer number (938349211072).

Almost surely, 2^{12638902638764} is an apocalyptic number.

It is an amenable number.

12638902638764 is a deficient number, since it is larger than the sum of its proper divisors (9881478426964).

12638902638764 is a wasteful number, since it uses less digits than its factorization.

12638902638764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151640525 (or 151640523 counting only the distinct ones).

The product of its (nonzero) digits is 125411328, while the sum is 65.

The spelling of 12638902638764 in words is "twelve trillion, six hundred thirty-eight billion, nine hundred two million, six hundred thirty-eight thousand, seven hundred sixty-four".