256266436158 has 48 divisors (see below), whose sum is σ = 563181166080. Its totient is φ = 84209606208.

The previous prime is 256266436157. The next prime is 256266436159. The reversal of 256266436158 is 851634662652.

256266436158 is a `hidden beast` number, since 2 + 5 + 626 + 6 + 4 + 3 + 6 + 1 + 5 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (256266436157) and next prime (256266436159).

It is a super-2 number, since 2×256266436158² (a number of 24 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256266436157) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1888 + ... + 715916.

It is an arithmetic number, because the mean of its divisors is an integer number (11732940960).

Almost surely, 2^256266436158 is an apocalyptic number.

256266436158 is an abundant number, since it is smaller than the sum of its proper divisors (306914729922).

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

256266436158 is a wasteful number, since it uses less digits than its factorization.

256266436158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 714321 (or 714318 counting only the distinct ones).

The product of its digits is 12441600, while the sum is 54.

The spelling of 256266436158 in words is "two hundred fifty-six billion, two hundred sixty-six million, four hundred thirty-six thousand, one hundred fifty-eight".