256632615116564 has 96 divisors (see below), whose sum is σ = 474600960261120. Its totient is φ = 121266713530368.

The previous prime is 256632615116557. The next prime is 256632615116629. The reversal of 256632615116564 is 465611516236652.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1318313462 + ... + 1318508114.

It is an arithmetic number, because the mean of its divisors is an integer number (4943760002720).

Almost surely, 2^{256632615116564} is an apocalyptic number.

It is an amenable number.

256632615116564 is a deficient number, since it is larger than the sum of its proper divisors (217968345144556).

256632615116564 is a wasteful number, since it uses less digits than its factorization.

256632615116564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195889 (or 195887 counting only the distinct ones).

The product of its digits is 46656000, while the sum is 59.

The spelling of 256632615116564 in words is "two hundred fifty-six trillion, six hundred thirty-two billion, six hundred fifteen million, one hundred sixteen thousand, five hundred sixty-four".