16681918345916 has 12 divisors (see below), whose sum is σ = 29320839015720. Its totient is φ = 8304535770000.

The previous prime is 16681918345787. The next prime is 16681918345921. The reversal of 16681918345916 is 61954381918661.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 9105849710 + ... + 9105851541.

It is an arithmetic number, because the mean of its divisors is an integer number (2443403251310).

Almost surely, 2^{16681918345916} is an apocalyptic number.

It is an amenable number.

16681918345916 is a deficient number, since it is larger than the sum of its proper divisors (12638920669804).

16681918345916 is a wasteful number, since it uses less digits than its factorization.

16681918345916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18211701484 (or 18211701482 counting only the distinct ones).

The product of its digits is 67184640, while the sum is 68.

The spelling of 16681918345916 in words is "sixteen trillion, six hundred eighty-one billion, nine hundred eighteen million, three hundred forty-five thousand, nine hundred sixteen".