16944400556 has 12 divisors (see below), whose sum is σ = 29775742920. Its totient is φ = 8437045440.

The previous prime is 16944400553. The next prime is 16944400607. The reversal of 16944400556 is 65500444961.

It is a super-2 number, since 2×16944400556² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16944400553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8787626 + ... + 8789553.

It is an arithmetic number, because the mean of its divisors is an integer number (2481311910).

Almost surely, 2^16944400556 is an apocalyptic number.

It is an amenable number.

16944400556 is a deficient number, since it is larger than the sum of its proper divisors (12831342364).

16944400556 is a wasteful number, since it uses less digits than its factorization.

16944400556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17577424 (or 17577422 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 44.

The spelling of 16944400556 in words is "sixteen billion, nine hundred forty-four million, four hundred thousand, five hundred fifty-six".