12686563938 has 64 divisors (see below), whose sum is σ = 27539665920. Its totient is φ = 3886444800.

The previous prime is 12686563831. The next prime is 12686563957. The reversal of 12686563938 is 83936568621.

It is a happy number.

12686563938 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 31 ways as a sum of consecutive naturals, for example, 309756 + ... + 348312.

It is an arithmetic number, because the mean of its divisors is an integer number (430307280).

Almost surely, 2^12686563938 is an apocalyptic number.

12686563938 is an abundant number, since it is smaller than the sum of its proper divisors (14853101982).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12686563938 is a wasteful number, since it uses less digits than its factorization.

12686563938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38683.

The product of its digits is 11197440, while the sum is 57.

The spelling of 12686563938 in words is "twelve billion, six hundred eighty-six million, five hundred sixty-three thousand, nine hundred thirty-eight".