1564536505 has 16 divisors (see below), whose sum is σ = 2160057600. Its totient is φ = 1065621312.

The previous prime is 1564536487. The next prime is 1564536529. The reversal of 1564536505 is 5056354651.

It is not a de Polignac number, because 1564536505 - 2¹⁵ = 1564503737 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 144789 + ... + 155218.

It is an arithmetic number, because the mean of its divisors is an integer number (135003600).

Almost surely, 2^1564536505 is an apocalyptic number.

It is an amenable number.

1564536505 is a deficient number, since it is larger than the sum of its proper divisors (595521095).

1564536505 is a wasteful number, since it uses less digits than its factorization.

1564536505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300168.

The product of its (nonzero) digits is 270000, while the sum is 40.

The square root of 1564536505 is about 39554.2223409840. Note that the first 3 decimals coincide. The cubic root of 1564536505 is about 1160.9011292089.

The spelling of 1564536505 in words is "one billion, five hundred sixty-four million, five hundred thirty-six thousand, five hundred five".