256168158 has 32 divisors (see below), whose sum is σ = 543393792. Its totient is φ = 80335200.

The previous prime is 256168139. The next prime is 256168163. The reversal of 256168158 is 851861652.

It is a super-2 number, since 2×256168158² = 131244250346225928, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6798 + ... + 23633.

It is an arithmetic number, because the mean of its divisors is an integer number (16981056).

Almost surely, 2^256168158 is an apocalyptic number.

256168158 is an abundant number, since it is smaller than the sum of its proper divisors (287225634).

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

256168158 is a wasteful number, since it uses less digits than its factorization.

256168158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30520.

The product of its digits is 115200, while the sum is 42.

The square root of 256168158 is about 16005.2540748343. The cubic root of 256168158 is about 635.0994185793.

The spelling of 256168158 in words is "two hundred fifty-six million, one hundred sixty-eight thousand, one hundred fifty-eight".