12644012036564 has 24 divisors (see below), whose sum is σ = 22841971152000. Its totient is φ = 6120336749184.

The previous prime is 12644012036497. The next prime is 12644012036609. The reversal of 12644012036564 is 46563021044621.

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, 325253564 + ... + 325292435.

It is an arithmetic number, because the mean of its divisors is an integer number (951748798000).

Almost surely, 2^{12644012036564} is an apocalyptic number.

It is an amenable number.

12644012036564 is a deficient number, since it is larger than the sum of its proper divisors (10197959115436).

12644012036564 is a wasteful number, since it uses less digits than its factorization.

12644012036564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 650546159 (or 650546157 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 44.

The spelling of 12644012036564 in words is "twelve trillion, six hundred forty-four billion, twelve million, thirty-six thousand, five hundred sixty-four".