256326663 has 16 divisors (see below), whose sum is σ = 380920320. Its totient is φ = 152366976.

The previous prime is 256326649. The next prime is 256326677. The reversal of 256326663 is 366623652.

It is an interprime number because it is at equal distance from previous prime (256326649) and next prime (256326677).

It is not a de Polignac number, because 256326663 - 2⁴ = 256326647 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256326613) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 131295 + ... + 133232.

It is an arithmetic number, because the mean of its divisors is an integer number (23807520).

Almost surely, 2^256326663 is an apocalyptic number.

256326663 is a deficient number, since it is larger than the sum of its proper divisors (124593657).

256326663 is a wasteful number, since it uses less digits than its factorization.

256326663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264566.

The product of its digits is 233280, while the sum is 39.

The square root of 256326663 is about 16010.2049643345. The cubic root of 256326663 is about 635.2303816137.

The spelling of 256326663 in words is "two hundred fifty-six million, three hundred twenty-six thousand, six hundred sixty-three".