256956759455 has 16 divisors (see below), whose sum is σ = 336389649408. Its totient is φ = 186872148000.

The previous prime is 256956759443. The next prime is 256956759463. The reversal of 256956759455 is 554957659652.

It is not a de Polignac number, because 256956759455 - 2¹⁸ = 256956497311 is a prime.

It is a super-2 number, since 2×256956759455² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3365150 + ... + 3440660.

It is an arithmetic number, because the mean of its divisors is an integer number (21024353088).

Almost surely, 2^256956759455 is an apocalyptic number.

256956759455 is a deficient number, since it is larger than the sum of its proper divisors (79432889953).

256956759455 is a wasteful number, since it uses less digits than its factorization.

256956759455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137398.

The product of its digits is 510300000, while the sum is 68.

The spelling of 256956759455 in words is "two hundred fifty-six billion, nine hundred fifty-six million, seven hundred fifty-nine thousand, four hundred fifty-five".