16644751845318 has 12 divisors (see below), whose sum is σ = 36063628998228. Its totient is φ = 5548250615100.

The previous prime is 16644751845283. The next prime is 16644751845341. The reversal of 16644751845318 is 81354815744661.

16644751845318 is a `hidden beast` number, since 1 + 6 + 6 + 4 + 47 + 51 + 8 + 4 + 531 + 8 = 666.

16644751845318 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×16644751845318² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 462354217908 + ... + 462354217943.

It is an arithmetic number, because the mean of its divisors is an integer number (3005302416519).

Almost surely, 2^{16644751845318} is an apocalyptic number.

16644751845318 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

16644751845318 is an abundant number, since it is smaller than the sum of its proper divisors (19418877152910).

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

16644751845318 is a wasteful number, since it uses less digits than its factorization.

16644751845318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 924708435859 (or 924708435856 counting only the distinct ones).

The product of its digits is 77414400, while the sum is 63.

The spelling of 16644751845318 in words is "sixteen trillion, six hundred forty-four billion, seven hundred fifty-one million, eight hundred forty-five thousand, three hundred eighteen".