2568142664 has 24 divisors (see below), whose sum is σ = 4929883110. Its totient is φ = 1254201984.

The previous prime is 2568142649. The next prime is 2568142669. The reversal of 2568142664 is 4662418652.

It can be written as a sum of positive squares in only one way, i.e., 2116920100 + 451222564 = 46010^2 + 21242^2 .

It is not an unprimeable number, because it can be changed into a prime (2568142669) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 72017 + ... + 101600.

Almost surely, 2^2568142664 is an apocalyptic number.

It is an amenable number.

2568142664 is a deficient number, since it is larger than the sum of its proper divisors (2361740446).

2568142664 is a wasteful number, since it uses less digits than its factorization.

2568142664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173709 (or 173662 counting only the distinct ones).

The product of its digits is 552960, while the sum is 44.

The square root of 2568142664 is about 50676.8454424701. The cubic root of 2568142664 is about 1369.4296139089.

The spelling of 2568142664 in words is "two billion, five hundred sixty-eight million, one hundred forty-two thousand, six hundred sixty-four".