12640624625 has 32 divisors (see below), whose sum is σ = 16740622080. Its totient is φ = 9508752000.

The previous prime is 12640624609. The next prime is 12640624639. The reversal of 12640624625 is 52642604621.

It is not a de Polignac number, because 12640624625 - 2⁴ = 12640624609 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 132365 + ... + 206885.

It is an arithmetic number, because the mean of its divisors is an integer number (523144440).

Almost surely, 2^12640624625 is an apocalyptic number.

It is an amenable number.

12640624625 is a deficient number, since it is larger than the sum of its proper divisors (4099997455).

12640624625 is an equidigital number, since it uses as much as digits as its factorization.

12640624625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74618 (or 74608 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 38.

The spelling of 12640624625 in words is "twelve billion, six hundred forty million, six hundred twenty-four thousand, six hundred twenty-five".