16444588764 has 12 divisors (see below), whose sum is σ = 38370707144. Its totient is φ = 5481529584.

The previous prime is 16444588763. The next prime is 16444588781. The reversal of 16444588764 is 46788544461.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16444588763) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 685191187 + ... + 685191210.

Almost surely, 2^16444588764 is an apocalyptic number.

It is an amenable number.

16444588764 is an abundant number, since it is smaller than the sum of its proper divisors (21926118380).

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

16444588764 is a wasteful number, since it uses less digits than its factorization.

16444588764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1370382404 (or 1370382402 counting only the distinct ones).

The product of its digits is 20643840, while the sum is 57.

The spelling of 16444588764 in words is "sixteen billion, four hundred forty-four million, five hundred eighty-eight thousand, seven hundred sixty-four".