16991770080684 has 192 divisors, whose sum is σ = 46180178250752. Its totient is φ = 4762495180800.

The previous prime is 16991770080679. The next prime is 16991770080697. The reversal of 16991770080684 is 48608007719961.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 869979999 + ... + 869999529.

Almost surely, 2^{16991770080684} is an apocalyptic number.

16991770080684 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16991770080684, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23090089125376).

16991770080684 is an abundant number, since it is smaller than the sum of its proper divisors (29188408170068).

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

16991770080684 is a wasteful number, since it uses less digits than its factorization.

16991770080684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20376 (or 20374 counting only the distinct ones).

The product of its (nonzero) digits is 36578304, while the sum is 66.

The spelling of 16991770080684 in words is "sixteen trillion, nine hundred ninety-one billion, seven hundred seventy million, eighty thousand, six hundred eighty-four".