2568681688 has 32 divisors (see below), whose sum is σ = 4875552000. Its totient is φ = 1268565760.

The previous prime is 2568681659. The next prime is 2568681701. The reversal of 2568681688 is 8861868652.

2568681688 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×2568681688² = 13196251228533058688, which 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 7 ways as a sum of consecutive naturals, for example, 1215753 + ... + 1217863.

It is an arithmetic number, because the mean of its divisors is an integer number (152361000).

Almost surely, 2^2568681688 is an apocalyptic number.

It is an amenable number.

2568681688 is a deficient number, since it is larger than the sum of its proper divisors (2306870312).

2568681688 is a wasteful number, since it uses less digits than its factorization.

2568681688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3915 (or 3911 counting only the distinct ones).

The product of its digits is 8847360, while the sum is 58.

The square root of 2568681688 is about 50682.1634108095. The cubic root of 2568681688 is about 1369.5254164515.

The spelling of 2568681688 in words is "two billion, five hundred sixty-eight million, six hundred eighty-one thousand, six hundred eighty-eight".