12639418860 has 24 divisors (see below), whose sum is σ = 35390372976. Its totient is φ = 3370511680.

The previous prime is 12639418837. The next prime is 12639418871. The reversal of 12639418860 is 6881493621.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105328431 + ... + 105328550.

It is an arithmetic number, because the mean of its divisors is an integer number (1474598874).

Almost surely, 2^12639418860 is an apocalyptic number.

12639418860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12639418860 is an abundant number, since it is smaller than the sum of its proper divisors (22750954116).

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

12639418860 is a wasteful number, since it uses less digits than its factorization.

12639418860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210656993 (or 210656991 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 48.

The spelling of 12639418860 in words is "twelve billion, six hundred thirty-nine million, four hundred eighteen thousand, eight hundred sixty".