12638894175 has 18 divisors (see below), whose sum is σ = 22637664192. Its totient is φ = 6740743440.

The previous prime is 12638894159. The next prime is 12638894251. The reversal of 12638894175 is 57149883621.

12638894175 is a `hidden beast` number, since 1 + 2 + 6 + 388 + 94 + 175 = 666.

It is not a de Polignac number, because 12638894175 - 2⁴ = 12638894159 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 28086207 + ... + 28086656.

Almost surely, 2^12638894175 is an apocalyptic number.

12638894175 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12638894175 is a deficient number, since it is larger than the sum of its proper divisors (9998770017).

12638894175 is a wasteful number, since it uses less digits than its factorization.

12638894175 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56172879 (or 56172871 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 54.

The spelling of 12638894175 in words is "twelve billion, six hundred thirty-eight million, eight hundred ninety-four thousand, one hundred seventy-five".