12639015264 has 24 divisors (see below), whose sum is σ = 33177415320. Its totient is φ = 4213005056.

The previous prime is 12639015253. The next prime is 12639015299. The reversal of 12639015264 is 46251093621.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65828109 + ... + 65828300.

It is an arithmetic number, because the mean of its divisors is an integer number (1382392305).

Almost surely, 2^12639015264 is an apocalyptic number.

It is an amenable number.

12639015264 is an abundant number, since it is smaller than the sum of its proper divisors (20538400056).

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

12639015264 is a wasteful number, since it uses less digits than its factorization.

12639015264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131656422 (or 131656414 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 39.

The spelling of 12639015264 in words is "twelve billion, six hundred thirty-nine million, fifteen thousand, two hundred sixty-four".