256560500260 has 12 divisors (see below), whose sum is σ = 538777050588. Its totient is φ = 102624200096.

The previous prime is 256560500249. The next prime is 256560500263. The reversal of 256560500260 is 62005065652.

256560500260 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 129385528804 + 127174971456 = 359702^2 + 356616^2 .

It is a super-2 number, since 2×256560500260² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (256560500263) 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 3 ways as a sum of consecutive naturals, for example, 6414012487 + ... + 6414012526.

It is an arithmetic number, because the mean of its divisors is an integer number (44898087549).

Almost surely, 2^256560500260 is an apocalyptic number.

256560500260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256560500260 is an abundant number, since it is smaller than the sum of its proper divisors (282216550328).

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

256560500260 is a wasteful number, since it uses less digits than its factorization.

256560500260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12828025022 (or 12828025020 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 37.

The spelling of 256560500260 in words is "two hundred fifty-six billion, five hundred sixty million, five hundred thousand, two hundred sixty".