2556716363257 has 16 divisors (see below), whose sum is σ = 2950150533120. Its totient is φ = 2170341673488.

The previous prime is 2556716363231. The next prime is 2556716363309. The reversal of 2556716363257 is 7523636176552.

It is a cyclic number.

It is not a de Polignac number, because 2556716363257 - 2²⁷ = 2556582145529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2556716363557) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2007778 + ... + 3024004.

It is an arithmetic number, because the mean of its divisors is an integer number (184384408320).

Almost surely, 2^{2556716363257} is an apocalyptic number.

It is an amenable number.

2556716363257 is a deficient number, since it is larger than the sum of its proper divisors (393434169863).

2556716363257 is a wasteful number, since it uses less digits than its factorization.

2556716363257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1019700.

The product of its digits is 47628000, while the sum is 58.

The spelling of 2556716363257 in words is "two trillion, five hundred fifty-six billion, seven hundred sixteen million, three hundred sixty-three thousand, two hundred fifty-seven".