12556753711865 has 32 divisors (see below), whose sum is σ = 16578048470400. Its totient is φ = 9129834141120.

The previous prime is 12556753711861. The next prime is 12556753711907. The reversal of 12556753711865 is 56811735765521.

It is not a de Polignac number, because 12556753711865 - 2² = 12556753711861 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12556753711798 and 12556753711807.

It is not an unprimeable number, because it can be changed into a prime (12556753711861) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25826786 + ... + 26308484.

It is an arithmetic number, because the mean of its divisors is an integer number (518064014700).

Almost surely, 2^{12556753711865} is an apocalyptic number.

It is an amenable number.

12556753711865 is a deficient number, since it is larger than the sum of its proper divisors (4021294758535).

12556753711865 is an equidigital number, since it uses as much as digits as its factorization.

12556753711865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485654 (or 485632 counting only the distinct ones).

The product of its digits is 52920000, while the sum is 62.

The spelling of 12556753711865 in words is "twelve trillion, five hundred fifty-six billion, seven hundred fifty-three million, seven hundred eleven thousand, eight hundred sixty-five".