256852544718 has 128 divisors (see below), whose sum is σ = 645878707200. Its totient is φ = 66152448000.

The previous prime is 256852544717. The next prime is 256852544731. The reversal of 256852544718 is 817445258652.

It is a happy number.

It is a super-2 number, since 2×256852544718² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256852544717) 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 63 ways as a sum of consecutive naturals, for example, 44122248 + ... + 44128068.

It is an arithmetic number, because the mean of its divisors is an integer number (5045927400).

Almost surely, 2^256852544718 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 256852544718, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (322939353600).

256852544718 is an abundant number, since it is smaller than the sum of its proper divisors (389026162482).

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

256852544718 is a wasteful number, since it uses less digits than its factorization.

256852544718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6634.

The product of its digits is 21504000, while the sum is 57.

The spelling of 256852544718 in words is "two hundred fifty-six billion, eight hundred fifty-two million, five hundred forty-four thousand, seven hundred eighteen".