256695118158 has 16 divisors (see below), whose sum is σ = 513662037840. Its totient is φ = 85519739136.

The previous prime is 256695118133. The next prime is 256695118159. The reversal of 256695118158 is 851811596652.

256695118158 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×256695118158² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 256695118098 and 256695118107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256695118159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11312785 + ... + 11335452.

It is an arithmetic number, because the mean of its divisors is an integer number (32103877365).

Almost surely, 2^256695118158 is an apocalyptic number.

256695118158 is an abundant number, since it is smaller than the sum of its proper divisors (256966919682).

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

256695118158 is a wasteful number, since it uses less digits than its factorization.

256695118158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22650131.

The product of its digits is 5184000, while the sum is 57.

The spelling of 256695118158 in words is "two hundred fifty-six billion, six hundred ninety-five million, one hundred eighteen thousand, one hundred fifty-eight".