256852634813 has 8 divisors (see below), whose sum is σ = 270474402720. Its totient is φ = 243241187760.

The previous prime is 256852634807. The next prime is 256852634821. The reversal of 256852634813 is 318436258652.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 256852634813 - 2²⁰ = 256851586237 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256852634833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2529095 + ... + 2628692.

It is an arithmetic number, because the mean of its divisors is an integer number (33809300340).

Almost surely, 2^256852634813 is an apocalyptic number.

It is an amenable number.

256852634813 is a deficient number, since it is larger than the sum of its proper divisors (13621767907).

256852634813 is a wasteful number, since it uses less digits than its factorization.

256852634813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5160427.

The product of its digits is 8294400, while the sum is 53.

The spelling of 256852634813 in words is "two hundred fifty-six billion, eight hundred fifty-two million, six hundred thirty-four thousand, eight hundred thirteen".