12987516172 has 12 divisors (see below), whose sum is σ = 22983526440. Its totient is φ = 6420794336.

The previous prime is 12987516131. The next prime is 12987516193. The reversal of 12987516172 is 27161578921.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18240538 + ... + 18241249.

It is an arithmetic number, because the mean of its divisors is an integer number (1915293870).

Almost surely, 2^12987516172 is an apocalyptic number.

It is an amenable number.

12987516172 is a deficient number, since it is larger than the sum of its proper divisors (9996010268).

12987516172 is a wasteful number, since it uses less digits than its factorization.

12987516172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36481880 (or 36481878 counting only the distinct ones).

The product of its digits is 423360, while the sum is 49.

The spelling of 12987516172 in words is "twelve billion, nine hundred eighty-seven million, five hundred sixteen thousand, one hundred seventy-two".