12644064164140 has 48 divisors (see below), whose sum is σ = 28229766280128. Its totient is φ = 4746450984704.

The previous prime is 12644064164119. The next prime is 12644064164191. The reversal of 12644064164140 is 4146146044621.

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, 259287847 + ... + 259336606.

It is an arithmetic number, because the mean of its divisors is an integer number (588120130836).

Almost surely, 2^{12644064164140} is an apocalyptic number.

12644064164140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12644064164140 is an abundant number, since it is smaller than the sum of its proper divisors (15585702115988).

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

12644064164140 is a wasteful number, since it uses less digits than its factorization.

12644064164140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 518624538 (or 518624536 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 43.

The spelling of 12644064164140 in words is "twelve trillion, six hundred forty-four billion, sixty-four million, one hundred sixty-four thousand, one hundred forty".