16991521382 has 16 divisors (see below), whose sum is σ = 27838121472. Its totient is φ = 7714026120.

The previous prime is 16991521373. The next prime is 16991521441. The reversal of 16991521382 is 28312519961.

16991521382 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 451118 + ... + 487329.

It is an arithmetic number, because the mean of its divisors is an integer number (1739882592).

Almost surely, 2^16991521382 is an apocalyptic number.

16991521382 is a deficient number, since it is larger than the sum of its proper divisors (10846600090).

16991521382 is a wasteful number, since it uses less digits than its factorization.

16991521382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 939283.

The product of its digits is 233280, while the sum is 47.

The spelling of 16991521382 in words is "sixteen billion, nine hundred ninety-one million, five hundred twenty-one thousand, three hundred eighty-two".