16644684000000 has 1008 divisors, whose sum is σ = 66620772243200. Its totient is φ = 3603916800000.

The previous prime is 16644683999963. The next prime is 16644684000011. The reversal of 16644684000000 is 48644661.

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 111 ways as a sum of consecutive naturals, for example, 1595994786 + ... + 1596005214.

Almost surely, 2^{16644684000000} is an apocalyptic number.

16644684000000 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 16644684000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33310386121600).

16644684000000 is an abundant number, since it is smaller than the sum of its proper divisors (49976088243200).

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

16644684000000 is an frugal number, since it uses more digits than its factorization.

16644684000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10504 (or 10465 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 39.

The spelling of 16644684000000 in words is "sixteen trillion, six hundred forty-four billion, six hundred eighty-four million", and thus it is an aban number.