256774696534 has 16 divisors (see below), whose sum is σ = 385695626400. Its totient is φ = 128209548544.

The previous prime is 256774696501. The next prime is 256774696579. The reversal of 256774696534 is 435696477652.

It is a super-2 number, since 2×256774696534² (a number of 24 digits) contains 22 as substring.

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, 11212704 + ... + 11235580.

It is an arithmetic number, because the mean of its divisors is an integer number (24105976650).

Almost surely, 2^256774696534 is an apocalyptic number.

256774696534 is a deficient number, since it is larger than the sum of its proper divisors (128920929866).

256774696534 is a wasteful number, since it uses less digits than its factorization.

256774696534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30407.

The product of its digits is 228614400, while the sum is 64.

The spelling of 256774696534 in words is "two hundred fifty-six billion, seven hundred seventy-four million, six hundred ninety-six thousand, five hundred thirty-four".