256734727471654 has 16 divisors (see below), whose sum is σ = 385499657851488. Its totient is φ = 128234843839872.

The previous prime is 256734727471489. The next prime is 256734727471679. The reversal of 256734727471654 is 456174727437652.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 248515972 + ... + 249546904.

It is an arithmetic number, because the mean of its divisors is an integer number (24093728615718).

Almost surely, 2^{256734727471654} is an apocalyptic number.

256734727471654 is a deficient number, since it is larger than the sum of its proper divisors (128764930379834).

256734727471654 is a wasteful number, since it uses less digits than its factorization.

256734727471654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1159359.

The product of its digits is 1659571200, while the sum is 70.

The spelling of 256734727471654 in words is "two hundred fifty-six trillion, seven hundred thirty-four billion, seven hundred twenty-seven million, four hundred seventy-one thousand, six hundred fifty-four".