16809809892 has 24 divisors (see below), whose sum is σ = 40488145152. Its totient is φ = 5422519200.

The previous prime is 16809809879. The next prime is 16809809927. The reversal of 16809809892 is 29890890861.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22593459 + ... + 22594202.

It is an arithmetic number, because the mean of its divisors is an integer number (1687006048).

Almost surely, 2^16809809892 is an apocalyptic number.

16809809892 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

16809809892 is an abundant number, since it is smaller than the sum of its proper divisors (23678335260).

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

16809809892 is a wasteful number, since it uses less digits than its factorization.

16809809892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45187699 (or 45187697 counting only the distinct ones).

The product of its (nonzero) digits is 4478976, while the sum is 60.

The spelling of 16809809892 in words is "sixteen billion, eight hundred nine million, eight hundred nine thousand, eight hundred ninety-two".