16644164545568 has 192 divisors, whose sum is σ = 39708254896128. Its totient is φ = 6717158876160.

The previous prime is 16644164545549. The next prime is 16644164545639. The reversal of 16644164545568 is 86554546144661.

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 31 ways as a sum of consecutive naturals, for example, 56314271 + ... + 56609057.

It is an arithmetic number, because the mean of its divisors is an integer number (206813827584).

Almost surely, 2^{16644164545568} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16644164545568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19854127448064).

16644164545568 is an abundant number, since it is smaller than the sum of its proper divisors (23064090350560).

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

16644164545568 is a wasteful number, since it uses less digits than its factorization.

16644164545568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295055 (or 295047 counting only the distinct ones).

The product of its digits is 331776000, while the sum is 65.

The spelling of 16644164545568 in words is "sixteen trillion, six hundred forty-four billion, one hundred sixty-four million, five hundred forty-five thousand, five hundred sixty-eight".