16643303424 has 576 divisors, whose sum is σ = 56665889280. Its totient is φ = 4655185920.

The previous prime is 16643303393. The next prime is 16643303437. The reversal of 16643303424 is 42430334661.

16643303424 is a `hidden beast` number, since 1 + 6 + 643 + 3 + 0 + 3 + 4 + 2 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (576).

It is a super-3 number, since 3×16643303424³ (a number of 32 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 200521687 + ... + 200521769.

It is an arithmetic number, because the mean of its divisors is an integer number (98378280).

Almost surely, 2^16643303424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16643303424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28332944640).

16643303424 is an abundant number, since it is smaller than the sum of its proper divisors (40022585856).

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

16643303424 is a wasteful number, since it uses less digits than its factorization.

16643303424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188 (or 165 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 36.

The spelling of 16643303424 in words is "sixteen billion, six hundred forty-three million, three hundred three thousand, four hundred twenty-four".