12638825695 has 32 divisors (see below), whose sum is σ = 16546146048. Its totient is φ = 9231065088.

The previous prime is 12638825609. The next prime is 12638825737. The reversal of 12638825695 is 59652883621.

It is a cyclic number.

It is not a de Polignac number, because 12638825695 - 2⁷ = 12638825567 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 437437 + ... + 465433.

It is an arithmetic number, because the mean of its divisors is an integer number (517067064).

Almost surely, 2^12638825695 is an apocalyptic number.

12638825695 is a deficient number, since it is larger than the sum of its proper divisors (3907320353).

12638825695 is a wasteful number, since it uses less digits than its factorization.

12638825695 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28179.

The product of its digits is 6220800, while the sum is 55.

The spelling of 12638825695 in words is "twelve billion, six hundred thirty-eight million, eight hundred twenty-five thousand, six hundred ninety-five".