16909712856 has 48 divisors (see below), whose sum is σ = 45803122560. Its totient is φ = 5635834560.

The previous prime is 16909712849. The next prime is 16909712893. The reversal of 16909712856 is 65821790961.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1044681 + ... + 1060743.

It is an arithmetic number, because the mean of its divisors is an integer number (954231720).

Almost surely, 2^16909712856 is an apocalyptic number.

It is an amenable number.

16909712856 is an abundant number, since it is smaller than the sum of its proper divisors (28893409704).

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

16909712856 is a wasteful number, since it uses less digits than its factorization.

16909712856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30696 (or 30689 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 54.

The spelling of 16909712856 in words is "sixteen billion, nine hundred nine million, seven hundred twelve thousand, eight hundred fifty-six".