12564525408 has 24 divisors (see below), whose sum is σ = 32981879448. Its totient is φ = 4188175104.

The previous prime is 12564525377. The next prime is 12564525419. The reversal of 12564525408 is 80452546521.

It is a tau number, because it is divible by the number of its divisors (24).

It is a self number, because there is not a number n which added to its sum of digits gives 12564525408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65440141 + ... + 65440332.

It is an arithmetic number, because the mean of its divisors is an integer number (1374244977).

Almost surely, 2^12564525408 is an apocalyptic number.

It is an amenable number.

12564525408 is an abundant number, since it is smaller than the sum of its proper divisors (20417354040).

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

12564525408 is a wasteful number, since it uses less digits than its factorization.

12564525408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130880486 (or 130880478 counting only the distinct ones).

The product of its (nonzero) digits is 384000, while the sum is 42.

The spelling of 12564525408 in words is "twelve billion, five hundred sixty-four million, five hundred twenty-five thousand, four hundred eight".