256768633 has 12 divisors (see below), whose sum is σ = 282204432. Its totient is φ = 231694320.

The previous prime is 256768627. The next prime is 256768637. The reversal of 256768633 is 336867652.

It is not a de Polignac number, because 256768633 - 2⁵ = 256768601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256768637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 270666 + ... + 271612.

It is an arithmetic number, because the mean of its divisors is an integer number (23517036).

Almost surely, 2^256768633 is an apocalyptic number.

It is an amenable number.

256768633 is a deficient number, since it is larger than the sum of its proper divisors (25435799).

256768633 is an equidigital number, since it uses as much as digits as its factorization.

256768633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1272 (or 1115 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 46.

The square root of 256768633 is about 16024.0017785820. The cubic root of 256768633 is about 635.5952696056.

The spelling of 256768633 in words is "two hundred fifty-six million, seven hundred sixty-eight thousand, six hundred thirty-three".