12500138872 has 32 divisors (see below), whose sum is σ = 25827666480. Its totient is φ = 5635123200.

The previous prime is 12500138863. The next prime is 12500138891. The reversal of 12500138872 is 27883100521.

It is a congruent number.

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, 1393129 + ... + 1402072.

Almost surely, 2^12500138872 is an apocalyptic number.

It is an amenable number.

12500138872 is an abundant number, since it is smaller than the sum of its proper divisors (13327527608).

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

12500138872 is a wasteful number, since it uses less digits than its factorization.

12500138872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2795263 (or 2795259 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 37.

The spelling of 12500138872 in words is "twelve billion, five hundred million, one hundred thirty-eight thousand, eight hundred seventy-two".