16991939328 has 432 divisors, whose sum is σ = 57937098240. Its totient is φ = 4380106752.

The previous prime is 16991939299. The next prime is 16991939329. The reversal of 16991939328 is 82393919961.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16991939329) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 22992783 + ... + 22993521.

Almost surely, 2^16991939328 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 16991939328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28968549120).

16991939328 is an abundant number, since it is smaller than the sum of its proper divisors (40945158912).

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

16991939328 is a wasteful number, since it uses less digits than its factorization.

16991939328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 832 (or 811 counting only the distinct ones).

The product of its digits is 5668704, while the sum is 60.

The spelling of 16991939328 in words is "sixteen billion, nine hundred ninety-one million, nine hundred thirty-nine thousand, three hundred twenty-eight".