2568537680 has 40 divisors (see below), whose sum is σ = 5987929992. Its totient is φ = 1024648704.

The previous prime is 2568537649. The next prime is 2568537691. The reversal of 2568537680 is 867358652.

It can be written as a sum of positive squares in 4 ways, for example, as 172239376 + 2396298304 = 13124^2 + 48952^2 .

It is a tau number, because it is divible by the number of its divisors (40).

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, 13199 + ... + 72878.

Almost surely, 2^2568537680 is an apocalyptic number.

2568537680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2568537680 is an abundant number, since it is smaller than the sum of its proper divisors (3419392312).

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

2568537680 is a wasteful number, since it uses less digits than its factorization.

2568537680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86463 (or 86457 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 50.

The square root of 2568537680 is about 50680.7426938477. The cubic root of 2568537680 is about 1369.4998227390.

The spelling of 2568537680 in words is "two billion, five hundred sixty-eight million, five hundred thirty-seven thousand, six hundred eighty".