12512639164 has 48 divisors (see below), whose sum is σ = 23866214400. Its totient is φ = 5717428416.

The previous prime is 12512639137. The next prime is 12512639173. The reversal of 12512639164 is 46193621521.

It is a super-2 number, since 2×12512639164² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3451857 + ... + 3455479.

It is an arithmetic number, because the mean of its divisors is an integer number (497212800).

Almost surely, 2^12512639164 is an apocalyptic number.

It is an amenable number.

12512639164 is a deficient number, since it is larger than the sum of its proper divisors (11353575236).

12512639164 is a wasteful number, since it uses less digits than its factorization.

12512639164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5242 (or 5240 counting only the distinct ones).

The product of its digits is 77760, while the sum is 40.

The spelling of 12512639164 in words is "twelve billion, five hundred twelve million, six hundred thirty-nine thousand, one hundred sixty-four".