1564056664 has 32 divisors (see below), whose sum is σ = 2981843280. Its totient is φ = 769007104.

The previous prime is 1564056601. The next prime is 1564056667. The reversal of 1564056664 is 4666504651.

It is a self number, because there is not a number n which added to its sum of digits gives 1564056664.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1564056667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110604 + ... + 123940.

Almost surely, 2^1564056664 is an apocalyptic number.

It is an amenable number.

1564056664 is a deficient number, since it is larger than the sum of its proper divisors (1417786616).

1564056664 is a wasteful number, since it uses less digits than its factorization.

1564056664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13587 (or 13583 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 43.

The square root of 1564056664 is about 39548.1562654949. The cubic root of 1564056664 is about 1160.7824348618.

The spelling of 1564056664 in words is "one billion, five hundred sixty-four million, fifty-six thousand, six hundred sixty-four".