256734255775275 has 120 divisors (see below), whose sum is σ = 476097840017184. Its totient is φ = 136770300403200.

The previous prime is 256734255775223. The next prime is 256734255775307. The reversal of 256734255775275 is 572577552437652.

256734255775275 is a `hidden beast` number, since 2 + 5 + 6 + 7 + 3 + 4 + 25 + 5 + 77 + 527 + 5 = 666.

It is not a de Polignac number, because 256734255775275 - 2¹³ = 256734255767083 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 18342084577 + ... + 18342098573.

Almost surely, 2^{256734255775275} is an apocalyptic number.

256734255775275 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

256734255775275 is a deficient number, since it is larger than the sum of its proper divisors (219363584241909).

256734255775275 is a wasteful number, since it uses less digits than its factorization.

256734255775275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23603 (or 23589 counting only the distinct ones).

The product of its digits is 4321800000, while the sum is 72.

The spelling of 256734255775275 in words is "two hundred fifty-six trillion, seven hundred thirty-four billion, two hundred fifty-five million, seven hundred seventy-five thousand, two hundred seventy-five".