16564530655 has 16 divisors (see below), whose sum is σ = 20832281280. Its totient is φ = 12620095488.

The previous prime is 16564530623. The next prime is 16564530691. The reversal of 16564530655 is 55603546561.

It is a cyclic number.

It is not a de Polignac number, because 16564530655 - 2⁵ = 16564530623 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 288162 + ... + 340831.

It is an arithmetic number, because the mean of its divisors is an integer number (1302017580).

Almost surely, 2^16564530655 is an apocalyptic number.

16564530655 is a deficient number, since it is larger than the sum of its proper divisors (4267750625).

16564530655 is a wasteful number, since it uses less digits than its factorization.

16564530655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 629250.

The product of its (nonzero) digits is 1620000, while the sum is 46.

The spelling of 16564530655 in words is "sixteen billion, five hundred sixty-four million, five hundred thirty thousand, six hundred fifty-five".