16923563568 has 120 divisors (see below), whose sum is σ = 50155123200. Its totient is φ = 5312138112.

The previous prime is 16923563551. The next prime is 16923563581. The reversal of 16923563568 is 86536532961.

It is a happy number.

16923563568 is a `hidden beast` number, since 1 + 6 + 9 + 23 + 56 + 3 + 568 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 438393 + ... + 475431.

It is an arithmetic number, because the mean of its divisors is an integer number (417959360).

Almost surely, 2^16923563568 is an apocalyptic number.

16923563568 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16923563568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25077561600).

16923563568 is an abundant number, since it is smaller than the sum of its proper divisors (33231559632).

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

16923563568 is a wasteful number, since it uses less digits than its factorization.

16923563568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37239 (or 37230 counting only the distinct ones).

The product of its digits is 6998400, while the sum is 54.

The spelling of 16923563568 in words is "sixteen billion, nine hundred twenty-three million, five hundred sixty-three thousand, five hundred sixty-eight".