256630423713457 has 8 divisors (see below), whose sum is σ = 263567113992000. Its totient is φ = 249693772007664.

The previous prime is 256630423713451. The next prime is 256630423713467. The reversal of 256630423713457 is 754317324036652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 256630423713457 - 2²⁷ = 256630289495729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256630423713451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4104294 + ... + 23024032.

It is an arithmetic number, because the mean of its divisors is an integer number (32945889249000).

Almost surely, 2^{256630423713457} is an apocalyptic number.

It is an amenable number.

256630423713457 is a deficient number, since it is larger than the sum of its proper divisors (6936690278543).

256630423713457 is a wasteful number, since it uses less digits than its factorization.

256630423713457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19286375.

The product of its (nonzero) digits is 76204800, while the sum is 58.

The spelling of 256630423713457 in words is "two hundred fifty-six trillion, six hundred thirty billion, four hundred twenty-three million, seven hundred thirteen thousand, four hundred fifty-seven".