16681683516 has 12 divisors (see below), whose sum is σ = 38923928232. Its totient is φ = 5560561168.

The previous prime is 16681683509. The next prime is 16681683527. The reversal of 16681683516 is 61538618661.

16681683516 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×16681683516² (a number of 21 digits) contains 22 as substring.

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, 695070135 + ... + 695070158.

It is an arithmetic number, because the mean of its divisors is an integer number (3243660686).

Almost surely, 2^16681683516 is an apocalyptic number.

It is an amenable number.

16681683516 is an abundant number, since it is smaller than the sum of its proper divisors (22242244716).

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

16681683516 is a wasteful number, since it uses less digits than its factorization.

16681683516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1390140300 (or 1390140298 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 51.

The spelling of 16681683516 in words is "sixteen billion, six hundred eighty-one million, six hundred eighty-three thousand, five hundred sixteen".