2568531604 has 6 divisors (see below), whose sum is σ = 4494930314. Its totient is φ = 1284265800.

The previous prime is 2568531577. The next prime is 2568531613. The reversal of 2568531604 is 4061358652.

It can be written as a sum of positive squares in only one way, i.e., 2279871504 + 288660100 = 47748^2 + 16990^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321066447 + ... + 321066454.

Almost surely, 2^2568531604 is an apocalyptic number.

It is an amenable number.

2568531604 is a deficient number, since it is larger than the sum of its proper divisors (1926398710).

2568531604 is a wasteful number, since it uses less digits than its factorization.

2568531604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 642132905 (or 642132903 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 40.

The square root of 2568531604 is about 50680.6827499394. The cubic root of 2568531604 is about 1369.4987428655.

The spelling of 2568531604 in words is "two billion, five hundred sixty-eight million, five hundred thirty-one thousand, six hundred four".