16644749808 has 20 divisors (see below), whose sum is σ = 42998937128. Its totient is φ = 5548249920.

The previous prime is 16644749801. The next prime is 16644749819. The reversal of 16644749808 is 80894744661.

It is a happy number.

16644749808 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16644749801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 173382763 + ... + 173382858.

Almost surely, 2^16644749808 is an apocalyptic number.

It is an amenable number.

16644749808 is an abundant number, since it is smaller than the sum of its proper divisors (26354187320).

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

16644749808 is a wasteful number, since it uses less digits than its factorization.

16644749808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346765632 (or 346765626 counting only the distinct ones).

The product of its (nonzero) digits is 9289728, while the sum is 57.

The spelling of 16644749808 in words is "sixteen billion, six hundred forty-four million, seven hundred forty-nine thousand, eight hundred eight".