16644806444 has 24 divisors (see below), whose sum is σ = 33292926240. Its totient is φ = 7132778496.

The previous prime is 16644806441. The next prime is 16644806459. The reversal of 16644806444 is 44460844661.

16644806444 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (16644806441) 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 7 ways as a sum of consecutive naturals, for example, 336044 + ... + 382380.

It is an arithmetic number, because the mean of its divisors is an integer number (1387205260).

Almost surely, 2^16644806444 is an apocalyptic number.

16644806444 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

16644806444 is an abundant number, since it is smaller than the sum of its proper divisors (16648119796).

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

16644806444 is a wasteful number, since it uses less digits than its factorization.

16644806444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59177 (or 59175 counting only the distinct ones).

The product of its (nonzero) digits is 1769472, while the sum is 47.

The spelling of 16644806444 in words is "sixteen billion, six hundred forty-four million, eight hundred six thousand, four hundred forty-four".