12638812506875 has 20 divisors (see below), whose sum is σ = 15813998369400. Its totient is φ = 10097901312000.

The previous prime is 12638812506863. The next prime is 12638812506917. The reversal of 12638812506875 is 57860521883621.

It is not a de Polignac number, because 12638812506875 - 2²⁶ = 12638745398011 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 12667685 + ... + 13628934.

It is an arithmetic number, because the mean of its divisors is an integer number (790699918470).

Almost surely, 2^{12638812506875} is an apocalyptic number.

12638812506875 is a deficient number, since it is larger than the sum of its proper divisors (3175185862525).

12638812506875 is an frugal number, since it uses more digits than its factorization.

12638812506875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26297408 (or 26297393 counting only the distinct ones).

The product of its (nonzero) digits is 38707200, while the sum is 62.

The spelling of 12638812506875 in words is "twelve trillion, six hundred thirty-eight billion, eight hundred twelve million, five hundred six thousand, eight hundred seventy-five".