16443403056 has 100 divisors (see below), whose sum is σ = 47691534352. Its totient is φ = 5469669504.

The previous prime is 16443403027. The next prime is 16443403099. The reversal of 16443403056 is 65030434461.

16443403056 is a `hidden beast` number, since 1 + 6 + 4 + 4 + 340 + 305 + 6 = 666.

It is a super-3 number, since 3×16443403056³ (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 a self number, because there is not a number n which added to its sum of digits gives 16443403056.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 618126 + ... + 644178.

Almost surely, 2^16443403056 is an apocalyptic number.

16443403056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16443403056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23845767176).

16443403056 is an abundant number, since it is smaller than the sum of its proper divisors (31248131296).

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

16443403056 is a wasteful number, since it uses less digits than its factorization.

16443403056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26560 (or 26545 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 36.

The spelling of 16443403056 in words is "sixteen billion, four hundred forty-three million, four hundred three thousand, fifty-six".