16865996928 has 128 divisors (see below), whose sum is σ = 49492684800. Its totient is φ = 5046113280.

The previous prime is 16865996909. The next prime is 16865996951. The reversal of 16865996928 is 82969956861.

It is a tau number, because it is divible by the number of its divisors (128).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 308425 + ... + 358967.

It is an arithmetic number, because the mean of its divisors is an integer number (386661600).

Almost surely, 2^16865996928 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 16865996928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24746342400).

16865996928 is an abundant number, since it is smaller than the sum of its proper divisors (32626687872).

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

16865996928 is a wasteful number, since it uses less digits than its factorization.

16865996928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50650 (or 50638 counting only the distinct ones).

The product of its digits is 100776960, while the sum is 69.

The spelling of 16865996928 in words is "sixteen billion, eight hundred sixty-five million, nine hundred ninety-six thousand, nine hundred twenty-eight".