12638825625 has 20 divisors (see below), whose sum is σ = 21057971792. Its totient is φ = 6740706000.

The previous prime is 12638825609. The next prime is 12638825737. The reversal of 12638825625 is 52652883621.

12638825625 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12638825625 - 2⁴ = 12638825609 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3368479 + ... + 3372228.

Almost surely, 2^12638825625 is an apocalyptic number.

12638825625 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12638825625 is a deficient number, since it is larger than the sum of its proper divisors (8419146167).

12638825625 is an frugal number, since it uses more digits than its factorization.

12638825625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6740730 (or 6740715 counting only the distinct ones).

The product of its digits is 1382400, while the sum is 48.

The spelling of 12638825625 in words is "twelve billion, six hundred thirty-eight million, eight hundred twenty-five thousand, six hundred twenty-five".