256539167 has 16 divisors (see below), whose sum is σ = 273629184. Its totient is φ = 240084000.

The previous prime is 256539131. The next prime is 256539187. The reversal of 256539167 is 761935652.

It is a cyclic number.

It is not a de Polignac number, because 256539167 - 2⁸ = 256538911 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256539187) by changing a digit.

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, 218492 + ... + 219662.

It is an arithmetic number, because the mean of its divisors is an integer number (17101824).

Almost surely, 2^256539167 is an apocalyptic number.

256539167 is a deficient number, since it is larger than the sum of its proper divisors (17090017).

256539167 is a wasteful number, since it uses less digits than its factorization.

256539167 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1430.

The product of its digits is 340200, while the sum is 44.

The square root of 256539167 is about 16016.8401065878. The cubic root of 256539167 is about 635.4058760512.

The spelling of 256539167 in words is "two hundred fifty-six million, five hundred thirty-nine thousand, one hundred sixty-seven".