1564784164 has 12 divisors (see below), whose sum is σ = 2740146444. Its totient is φ = 781885184.

The previous prime is 1564784141. The next prime is 1564784171. The reversal of 1564784164 is 4614874651.

It can be written as a sum of positive squares in 2 ways, for example, as 709689600 + 855094564 = 26640^2 + 29242^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 119737 + ... + 132160.

It is an arithmetic number, because the mean of its divisors is an integer number (228345537).

Almost surely, 2^1564784164 is an apocalyptic number.

It is an amenable number.

1564784164 is a deficient number, since it is larger than the sum of its proper divisors (1175362280).

1564784164 is a wasteful number, since it uses less digits than its factorization.

1564784164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253454 (or 253452 counting only the distinct ones).

The product of its digits is 645120, while the sum is 46.

The square root of 1564784164 is about 39557.3528436876. The cubic root of 1564784164 is about 1160.9623810968.

The spelling of 1564784164 in words is "one billion, five hundred sixty-four million, seven hundred eighty-four thousand, one hundred sixty-four".