16681918346076 has 48 divisors (see below), whose sum is σ = 39396185337600. Its totient is φ = 5493510118272.

The previous prime is 16681918346021. The next prime is 16681918346081. The reversal of 16681918346076 is 67064381918661.

It is a junction number, because it is equal to n+sod(n) for n = 16681918345998 and 16681918346016.

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 15 ways as a sum of consecutive naturals, for example, 15587961 + ... + 16623728.

It is an arithmetic number, because the mean of its divisors is an integer number (820753861200).

Almost surely, 2^{16681918346076} is an apocalyptic number.

It is an amenable number.

16681918346076 is an abundant number, since it is smaller than the sum of its proper divisors (22714266991524).

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

16681918346076 is a wasteful number, since it uses less digits than its factorization.

16681918346076 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32212218 (or 32212216 counting only the distinct ones).

The product of its (nonzero) digits is 62705664, while the sum is 66.

The spelling of 16681918346076 in words is "sixteen trillion, six hundred eighty-one billion, nine hundred eighteen million, three hundred forty-six thousand, seventy-six".