16644735804 has 12 divisors (see below), whose sum is σ = 38837716904. Its totient is φ = 5548245264.

The previous prime is 16644735787. The next prime is 16644735817. The reversal of 16644735804 is 40853744661.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 693530647 + ... + 693530670.

Almost surely, 2^16644735804 is an apocalyptic number.

It is an amenable number.

16644735804 is an abundant number, since it is smaller than the sum of its proper divisors (22192981100).

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

16644735804 is a wasteful number, since it uses less digits than its factorization.

16644735804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1387061324 (or 1387061322 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 48.

The spelling of 16644735804 in words is "sixteen billion, six hundred forty-four million, seven hundred thirty-five thousand, eight hundred four".