16897645688 has 96 divisors (see below), whose sum is σ = 40250390400. Its totient is φ = 6576292800.

The previous prime is 16897645651. The next prime is 16897645691. The reversal of 16897645688 is 88654679861.

It is a congruent number.

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, 5686043 + ... + 5689013.

It is an arithmetic number, because the mean of its divisors is an integer number (419274900).

Almost surely, 2^16897645688 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 16897645688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20125195200).

16897645688 is an abundant number, since it is smaller than the sum of its proper divisors (23352744712).

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

16897645688 is a wasteful number, since it uses less digits than its factorization.

16897645688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4321 (or 4310 counting only the distinct ones).

The product of its digits is 139345920, while the sum is 68.

The spelling of 16897645688 in words is "sixteen billion, eight hundred ninety-seven million, six hundred forty-five thousand, six hundred eighty-eight".