256531040135652 has 48 divisors (see below), whose sum is σ = 602697596239872. Its totient is φ = 84922511941920.

The previous prime is 256531040135563. The next prime is 256531040135659.

256531040135652 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×256531040135652² (a number of 30 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (256531040135659) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90803598 + ... + 93586085.

It is an arithmetic number, because the mean of its divisors is an integer number (12556199921664).

Almost surely, 2^{256531040135652} is an apocalyptic number.

It is an amenable number.

256531040135652 is an abundant number, since it is smaller than the sum of its proper divisors (346166556104220).

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

256531040135652 is a wasteful number, since it uses less digits than its factorization.

256531040135652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184390488 (or 184390486 counting only the distinct ones).

The product of its (nonzero) digits is 3240000, while the sum is 48.

The spelling of 256531040135652 in words is "two hundred fifty-six trillion, five hundred thirty-one billion, forty million, one hundred thirty-five thousand, six hundred fifty-two".