16868690305872 has 80 divisors (see below), whose sum is σ = 43661098510848. Its totient is φ = 5612106282880.

The previous prime is 16868690305871. The next prime is 16868690305937. The reversal of 16868690305872 is 27850309686861.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 16868690305797 and 16868690305806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16868690305871) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 206503597 + ... + 206585267.

Almost surely, 2^{16868690305872} is an apocalyptic number.

16868690305872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

16868690305872 is an abundant number, since it is smaller than the sum of its proper divisors (26792408204976).

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

16868690305872 is a wasteful number, since it uses less digits than its factorization.

16868690305872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89888 (or 89882 counting only the distinct ones).

The product of its (nonzero) digits is 209018880, while the sum is 69.

The spelling of 16868690305872 in words is "sixteen trillion, eight hundred sixty-eight billion, six hundred ninety million, three hundred five thousand, eight hundred seventy-two".