16699885809920 has 576 divisors, whose sum is σ = 42689099464704. Its totient is φ = 6251801149440.

The previous prime is 16699885809883. The next prime is 16699885809941. The reversal of 16699885809920 is 2990858899661.

It is a Harshad number since it is a multiple of its sum of digits (80).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 36068867609 + ... + 36068868071.

It is an arithmetic number, because the mean of its divisors is an integer number (74113019904).

Almost surely, 2^{16699885809920} is an apocalyptic number.

16699885809920 is a gapful number since it is divisible by the number (10) 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 16699885809920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21344549732352).

16699885809920 is an abundant number, since it is smaller than the sum of its proper divisors (25989213654784).

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

16699885809920 is a wasteful number, since it uses less digits than its factorization.

16699885809920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 838 (or 824 counting only the distinct ones).

The product of its (nonzero) digits is 1209323520, while the sum is 80.

The spelling of 16699885809920 in words is "sixteen trillion, six hundred ninety-nine billion, eight hundred eighty-five million, eight hundred nine thousand, nine hundred twenty".