256777827159 has 64 divisors (see below), whose sum is σ = 397931111424. Its totient is φ = 144264830976.

The previous prime is 256777827151. The next prime is 256777827169. The reversal of 256777827159 is 951728777652.

It is not a de Polignac number, because 256777827159 - 2³ = 256777827151 is a prime.

It is a super-2 number, since 2×256777827159² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 256777827159.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256777827151) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 130144897 + ... + 130146869.

It is an arithmetic number, because the mean of its divisors is an integer number (6217673616).

Almost surely, 2^256777827159 is an apocalyptic number.

256777827159 is a deficient number, since it is larger than the sum of its proper divisors (141153284265).

256777827159 is a wasteful number, since it uses less digits than its factorization.

256777827159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2536.

The product of its digits is 103723200, while the sum is 66.

The spelling of 256777827159 in words is "two hundred fifty-six billion, seven hundred seventy-seven million, eight hundred twenty-seven thousand, one hundred fifty-nine".