1564656264 has 40 divisors (see below), whose sum is σ = 4382488110. Its totient is φ = 521551872.

The previous prime is 1564656263. The next prime is 1564656287. The reversal of 1564656264 is 4626564651.

1564656264 is a `hidden beast` number, since 1 + 564 + 65 + 6 + 26 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1435652100 + 129004164 = 37890^2 + 11358^2 .

It is not an unprimeable number, because it can be changed into a prime (1564656263) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1206649 + ... + 1207944.

Almost surely, 2^1564656264 is an apocalyptic number.

It is an amenable number.

1564656264 is an abundant number, since it is smaller than the sum of its proper divisors (2817831846).

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

1564656264 is a wasteful number, since it uses less digits than its factorization.

1564656264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2414611 (or 2414598 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 45.

The square root of 1564656264 is about 39555.7361706239. The cubic root of 1564656264 is about 1160.9307492296.

The spelling of 1564656264 in words is "one billion, five hundred sixty-four million, six hundred fifty-six thousand, two hundred sixty-four".