256183664 has 40 divisors (see below), whose sum is σ = 550679040. Its totient is φ = 114468800.

The previous prime is 256183663. The next prime is 256183667. The reversal of 256183664 is 466381652.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256183661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1952 + ... + 22719.

It is an arithmetic number, because the mean of its divisors is an integer number (13766976).

Almost surely, 2^256183664 is an apocalyptic number.

It is an amenable number.

256183664 is an abundant number, since it is smaller than the sum of its proper divisors (294495376).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

256183664 is a wasteful number, since it uses less digits than its factorization.

256183664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24749 (or 24743 counting only the distinct ones).

The product of its digits is 207360, while the sum is 41.

The square root of 256183664 is about 16005.7384709360. The cubic root of 256183664 is about 635.1122326269.

The spelling of 256183664 in words is "two hundred fifty-six million, one hundred eighty-three thousand, six hundred sixty-four".