2564138530 has 32 divisors (see below), whose sum is σ = 4802295600. Its totient is φ = 984544512.

The previous prime is 2564138527. The next prime is 2564138561. The reversal of 2564138530 is 358314652.

It can be written as a sum of positive squares in 8 ways, for example, as 2327194081 + 236944449 = 48241^2 + 15393^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2564138530.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24616 + ... + 75724.

Almost surely, 2^2564138530 is an apocalyptic number.

2564138530 is a deficient number, since it is larger than the sum of its proper divisors (2238157070).

2564138530 is a wasteful number, since it uses less digits than its factorization.

2564138530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51318.

The product of its (nonzero) digits is 86400, while the sum is 37.

The square root of 2564138530 is about 50637.3234877200. The cubic root of 2564138530 is about 1368.7175257476.

The spelling of 2564138530 in words is "two billion, five hundred sixty-four million, one hundred thirty-eight thousand, five hundred thirty".