1564500564 has 36 divisors (see below), whose sum is σ = 4314229920. Its totient is φ = 474090960.

The previous prime is 1564500557. The next prime is 1564500577. The reversal of 1564500564 is 4650054651.

1564500564 is a `hidden beast` number, since 1 + 5 + 645 + 0 + 0 + 5 + 6 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1974984 + ... + 1975775.

It is an arithmetic number, because the mean of its divisors is an integer number (119839720).

Almost surely, 2^1564500564 is an apocalyptic number.

It is an amenable number.

1564500564 is an abundant number, since it is smaller than the sum of its proper divisors (2749729356).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1564500564 is a wasteful number, since it uses less digits than its factorization.

1564500564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3950780 (or 3950775 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

The square root of 1564500564 is about 39553.7680126685. The cubic root of 1564500564 is about 1160.8922396183.

The spelling of 1564500564 in words is "one billion, five hundred sixty-four million, five hundred thousand, five hundred sixty-four".