256464755 has 16 divisors (see below), whose sum is σ = 327175200. Its totient is φ = 192441600.

The previous prime is 256464749. The next prime is 256464757. The reversal of 256464755 is 557464652.

It is not a de Polignac number, because 256464755 - 2²⁰ = 255416179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (256464757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3770 + ... + 22959.

It is an arithmetic number, because the mean of its divisors is an integer number (20448450).

Almost surely, 2^256464755 is an apocalyptic number.

256464755 is a deficient number, since it is larger than the sum of its proper divisors (70710445).

256464755 is a wasteful number, since it uses less digits than its factorization.

256464755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26854.

The product of its digits is 1008000, while the sum is 44.

The square root of 256464755 is about 16014.5170080149. The cubic root of 256464755 is about 635.3444346284.

The spelling of 256464755 in words is "two hundred fifty-six million, four hundred sixty-four thousand, seven hundred fifty-five".