256810608318 has 64 divisors (see below), whose sum is σ = 568979435520. Its totient is φ = 76619109600.

The previous prime is 256810608217. The next prime is 256810608323. The reversal of 256810608318 is 813806018652.

It is a super-2 number, since 2×256810608318² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8878203 + ... + 8907081.

It is an arithmetic number, because the mean of its divisors is an integer number (8890303680).

Almost surely, 2^256810608318 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 256810608318, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (284489717760).

256810608318 is an abundant number, since it is smaller than the sum of its proper divisors (312168827202).

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

256810608318 is a wasteful number, since it uses less digits than its factorization.

256810608318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30973.

The product of its (nonzero) digits is 552960, while the sum is 48.

The spelling of 256810608318 in words is "two hundred fifty-six billion, eight hundred ten million, six hundred eight thousand, three hundred eighteen".