16813391504 has 40 divisors (see below), whose sum is σ = 40093475520. Its totient is φ = 6651451008.

The previous prime is 16813391503. The next prime is 16813391513. The reversal of 16813391504 is 40519331861.

It is not an unprimeable number, because it can be changed into a prime (16813391503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5772374 + ... + 5775285.

It is an arithmetic number, because the mean of its divisors is an integer number (1002336888).

Almost surely, 2^16813391504 is an apocalyptic number.

16813391504 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

16813391504 is an abundant number, since it is smaller than the sum of its proper divisors (23280084016).

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

16813391504 is a wasteful number, since it uses less digits than its factorization.

16813391504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11547687 (or 11547681 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 41.

The spelling of 16813391504 in words is "sixteen billion, eight hundred thirteen million, three hundred ninety-one thousand, five hundred four".