2568640782 has 16 divisors (see below), whose sum is σ = 5360641920. Its totient is φ = 818986872.

The previous prime is 2568640729. The next prime is 2568640807. The reversal of 2568640782 is 2870468652.

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, 9306532 + ... + 9306807.

It is an arithmetic number, because the mean of its divisors is an integer number (335040120).

Almost surely, 2^2568640782 is an apocalyptic number.

2568640782 is an abundant number, since it is smaller than the sum of its proper divisors (2792001138).

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

2568640782 is a wasteful number, since it uses less digits than its factorization.

2568640782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18613367.

The product of its (nonzero) digits is 1290240, while the sum is 48.

The square root of 2568640782 is about 50681.7598550011. The cubic root of 2568640782 is about 1369.5181465610.

The spelling of 2568640782 in words is "two billion, five hundred sixty-eight million, six hundred forty thousand, seven hundred eighty-two".