12509622564 has 24 divisors (see below), whose sum is σ = 29215142880. Its totient is φ = 4166156544.

The previous prime is 12509622547. The next prime is 12509622581. The reversal of 12509622564 is 46522690521.

It is an interprime number because it is at equal distance from previous prime (12509622547) and next prime (12509622581).

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, 450669 + ... + 477620.

It is an arithmetic number, because the mean of its divisors is an integer number (1217297620).

Almost surely, 2^12509622564 is an apocalyptic number.

It is an amenable number.

12509622564 is an abundant number, since it is smaller than the sum of its proper divisors (16705520316).

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

12509622564 is a wasteful number, since it uses less digits than its factorization.

12509622564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 929419 (or 929417 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 42.

The spelling of 12509622564 in words is "twelve billion, five hundred nine million, six hundred twenty-two thousand, five hundred sixty-four".