256100956 has 12 divisors (see below), whose sum is σ = 448301392. Its totient is φ = 128014848.

The previous prime is 256100917. The next prime is 256100959. The reversal of 256100956 is 659001652.

It is a happy number.

It is a super-2 number, since 2×256100956² = 131175399328227872, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256100959) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13561 + ... + 26383.

Almost surely, 2^256100956 is an apocalyptic number.

It is an amenable number.

256100956 is a deficient number, since it is larger than the sum of its proper divisors (192200436).

256100956 is a wasteful number, since it uses less digits than its factorization.

256100956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17820 (or 17818 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 34.

The square root of 256100956 is about 16003.1545640227. The cubic root of 256100956 is about 635.0438773492.

The spelling of 256100956 in words is "two hundred fifty-six million, one hundred thousand, nine hundred fifty-six".