256501153627746 has 64 divisors (see below), whose sum is σ = 543134607206400. Its totient is φ = 80617298642496.

The previous prime is 256501153627711. The next prime is 256501153627751. The reversal of 256501153627746 is 647726351105652.

It is a self number, because there is not a number n which added to its sum of digits gives 256501153627746.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37123575 + ... + 43487493.

It is an arithmetic number, because the mean of its divisors is an integer number (8486478237600).

Almost surely, 2^{256501153627746} is an apocalyptic number.

256501153627746 is an abundant number, since it is smaller than the sum of its proper divisors (286633453578654).

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

256501153627746 is a wasteful number, since it uses less digits than its factorization.

256501153627746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6369383.

The product of its (nonzero) digits is 63504000, while the sum is 60.

The spelling of 256501153627746 in words is "two hundred fifty-six trillion, five hundred one billion, one hundred fifty-three million, six hundred twenty-seven thousand, seven hundred forty-six".