16644457194 has 48 divisors (see below), whose sum is σ = 34936761600. Its totient is φ = 5280940800.

The previous prime is 16644457183. The next prime is 16644457213. The reversal of 16644457194 is 49175444661.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 680082 + ... + 704130.

It is an arithmetic number, because the mean of its divisors is an integer number (727849200).

Almost surely, 2^16644457194 is an apocalyptic number.

16644457194 is an abundant number, since it is smaller than the sum of its proper divisors (18292304406).

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

16644457194 is a wasteful number, since it uses less digits than its factorization.

16644457194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24207 (or 24146 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 51.

The spelling of 16644457194 in words is "sixteen billion, six hundred forty-four million, four hundred fifty-seven thousand, one hundred ninety-four".