12643605164 has 24 divisors (see below), whose sum is σ = 22572729648. Its totient is φ = 6194560320.

The previous prime is 12643605151. The next prime is 12643605181. The reversal of 12643605164 is 46150634621.

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, 128954 + ... + 204734.

It is an arithmetic number, because the mean of its divisors is an integer number (940530402).

Almost surely, 2^12643605164 is an apocalyptic number.

It is an amenable number.

12643605164 is a deficient number, since it is larger than the sum of its proper divisors (9929124484).

12643605164 is a wasteful number, since it uses less digits than its factorization.

12643605164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76625 (or 76623 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 38.

The spelling of 12643605164 in words is "twelve billion, six hundred forty-three million, six hundred five thousand, one hundred sixty-four".