16564044316506 has 32 divisors (see below), whose sum is σ = 33898830820800. Its totient is φ = 5392893510144.

The previous prime is 16564044316441. The next prime is 16564044316513. The reversal of 16564044316506 is 60561344046561.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34760796 + ... + 35234088.

It is an arithmetic number, because the mean of its divisors is an integer number (1059338463150).

Almost surely, 2^{16564044316506} is an apocalyptic number.

16564044316506 is an abundant number, since it is smaller than the sum of its proper divisors (17334786504294).

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

16564044316506 is a wasteful number, since it uses less digits than its factorization.

16564044316506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 608990.

The product of its (nonzero) digits is 6220800, while the sum is 51.

The spelling of 16564044316506 in words is "sixteen trillion, five hundred sixty-four billion, forty-four million, three hundred sixteen thousand, five hundred six".