256792155 has 16 divisors (see below), whose sum is σ = 418620960. Its totient is φ = 134371328.

The previous prime is 256792141. The next prime is 256792169. The reversal of 256792155 is 551297652.

It is an interprime number because it is at equal distance from previous prime (256792141) and next prime (256792169).

It is a cyclic number.

It is not a de Polignac number, because 256792155 - 2⁴ = 256792139 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 160710 + ... + 162299.

It is an arithmetic number, because the mean of its divisors is an integer number (26163810).

Almost surely, 2^256792155 is an apocalyptic number.

256792155 is a deficient number, since it is larger than the sum of its proper divisors (161828805).

256792155 is a wasteful number, since it uses less digits than its factorization.

256792155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323070.

The product of its digits is 189000, while the sum is 42.

The square root of 256792155 is about 16024.7357232499. The cubic root of 256792155 is about 635.6146774998.

The spelling of 256792155 in words is "two hundred fifty-six million, seven hundred ninety-two thousand, one hundred fifty-five".