1564664404 has 12 divisors (see below), whose sum is σ = 2796421824. Its totient is φ = 765686744.

The previous prime is 1564664389. The next prime is 1564664429. The reversal of 1564664404 is 4044664651.

It is a congruent number.

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, 4161154 + ... + 4161529.

It is an arithmetic number, because the mean of its divisors is an integer number (233035152).

Almost surely, 2^1564664404 is an apocalyptic number.

It is an amenable number.

1564664404 is a deficient number, since it is larger than the sum of its proper divisors (1231757420).

1564664404 is a wasteful number, since it uses less digits than its factorization.

1564664404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8322734 (or 8322732 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 40.

The square root of 1564664404 is about 39555.8390632786. The cubic root of 1564664404 is about 1160.9327624428.

The spelling of 1564664404 in words is "one billion, five hundred sixty-four million, six hundred sixty-four thousand, four hundred four".