16851990016 has 40 divisors (see below), whose sum is σ = 34832167920. Its totient is φ = 8135436288.

The previous prime is 16851989989. The next prime is 16851990049. The reversal of 16851990016 is 61009915861.

It is a happy number.

16851990016 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 3 ways as a sum of consecutive naturals, for example, 552636 + ... + 582331.

It is an arithmetic number, because the mean of its divisors is an integer number (870804198).

Almost surely, 2^16851990016 is an apocalyptic number.

16851990016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

16851990016 is an abundant number, since it is smaller than the sum of its proper divisors (17980177904).

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

16851990016 is an equidigital number, since it uses as much as digits as its factorization.

16851990016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1135014 (or 1134998 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 46.

The spelling of 16851990016 in words is "sixteen billion, eight hundred fifty-one million, nine hundred ninety thousand, sixteen".