16644044551504 has 80 divisors (see below), whose sum is σ = 34036479115200. Its totient is φ = 7862805070848.

The previous prime is 16644044551493. The next prime is 16644044551507. The reversal of 16644044551504 is 40515544044661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16644044551507) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 588468147 + ... + 588496429.

It is an arithmetic number, because the mean of its divisors is an integer number (425455988940).

Almost surely, 2^{16644044551504} 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 16644044551504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17018239557600).

16644044551504 is an abundant number, since it is smaller than the sum of its proper divisors (17392434563696).

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

16644044551504 is a wasteful number, since it uses less digits than its factorization.

16644044551504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33452 (or 33446 counting only the distinct ones).

The product of its (nonzero) digits is 4608000, while the sum is 49.

The spelling of 16644044551504 in words is "sixteen trillion, six hundred forty-four billion, forty-four million, five hundred fifty-one thousand, five hundred four".