12256561566725 has 72 divisors (see below), whose sum is σ = 18678233802240. Its totient is φ = 7942034997120.

The previous prime is 12256561566671. The next prime is 12256561566731. The reversal of 12256561566725 is 52766516565221.

It is not a de Polignac number, because 12256561566725 - 2²² = 12256557372421 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2000669 + ... + 5340018.

It is an arithmetic number, because the mean of its divisors is an integer number (259419913920).

Almost surely, 2^{12256561566725} is an apocalyptic number.

It is an amenable number.

12256561566725 is a deficient number, since it is larger than the sum of its proper divisors (6421672235515).

12256561566725 is a wasteful number, since it uses less digits than its factorization.

12256561566725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7340787 (or 7340775 counting only the distinct ones).

The product of its digits is 45360000, while the sum is 59.

The spelling of 12256561566725 in words is "twelve trillion, two hundred fifty-six billion, five hundred sixty-one million, five hundred sixty-six thousand, seven hundred twenty-five".