16564315568 has 80 divisors (see below), whose sum is σ = 34742437056. Its totient is φ = 7621386240.

The previous prime is 16564315553. The next prime is 16564315571. The reversal of 16564315568 is 86551346561.

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, 4510373 + ... + 4514043.

Almost surely, 2^16564315568 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16564315568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17371218528).

16564315568 is an abundant number, since it is smaller than the sum of its proper divisors (18178121488).

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

16564315568 is a wasteful number, since it uses less digits than its factorization.

16564315568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4062 (or 4056 counting only the distinct ones).

The product of its digits is 2592000, while the sum is 50.

The spelling of 16564315568 in words is "sixteen billion, five hundred sixty-four million, three hundred fifteen thousand, five hundred sixty-eight".