16644161912 has 32 divisors (see below), whose sum is σ = 35765452800. Its totient is φ = 7113333984.

The previous prime is 16644161867. The next prime is 16644161953. The reversal of 16644161912 is 21916144661.

It is a self number, because there is not a number n which added to its sum of digits gives 16644161912.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 393848 + ... + 434055.

It is an arithmetic number, because the mean of its divisors is an integer number (1117670400).

Almost surely, 2^16644161912 is an apocalyptic number.

It is an amenable number.

16644161912 is an abundant number, since it is smaller than the sum of its proper divisors (19121290888).

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

16644161912 is a wasteful number, since it uses less digits than its factorization.

16644161912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 828275 (or 828271 counting only the distinct ones).

The product of its digits is 62208, while the sum is 41.

The spelling of 16644161912 in words is "sixteen billion, six hundred forty-four million, one hundred sixty-one thousand, nine hundred twelve".