16443633616 has 40 divisors (see below), whose sum is σ = 33549816960. Its totient is φ = 7792177536.

The previous prime is 16443633611. The next prime is 16443633623. The reversal of 16443633616 is 61633634461.

It is a super-3 number, since 3×16443633616³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16443633611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 164860 + ... + 245083.

It is an arithmetic number, because the mean of its divisors is an integer number (838745424).

Almost surely, 2^16443633616 is an apocalyptic number.

16443633616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

16443633616 is an abundant number, since it is smaller than the sum of its proper divisors (17106183344).

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

16443633616 is a wasteful number, since it uses less digits than its factorization.

16443633616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410083 (or 410077 counting only the distinct ones).

The product of its digits is 559872, while the sum is 43.

The spelling of 16443633616 in words is "sixteen billion, four hundred forty-three million, six hundred thirty-three thousand, six hundred sixteen".