16991589838392 has 96 divisors (see below), whose sum is σ = 49561097367600. Its totient is φ = 5227939519488.

The previous prime is 16991589838369. The next prime is 16991589838393. The reversal of 16991589838392 is 29383898519961.

16991589838392 is a `hidden beast` number, since 1 + 6 + 9 + 91 + 58 + 98 + 3 + 8 + 392 = 666.

It is a super-2 number, since 2×16991589838392² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16991589838393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20363659 + ... + 21181637.

Almost surely, 2^{16991589838392} is an apocalyptic number.

16991589838392 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

16991589838392 is an abundant number, since it is smaller than the sum of its proper divisors (32569507529208).

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

16991589838392 is a wasteful number, since it uses less digits than its factorization.

16991589838392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 840197 (or 840190 counting only the distinct ones).

The product of its digits is 1813985280, while the sum is 81.

The spelling of 16991589838392 in words is "sixteen trillion, nine hundred ninety-one billion, five hundred eighty-nine million, eight hundred thirty-eight thousand, three hundred ninety-two".