16228145556 has 432 divisors, whose sum is σ = 52982092800. Its totient is φ = 4317872832.

The previous prime is 16228145513. The next prime is 16228145579. The reversal of 16228145556 is 65554182261.

16228145556 is a `hidden beast` number, since 1 + 62 + 28 + 14 + 5 + 556 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 71489515 + ... + 71489741.

Almost surely, 2^16228145556 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 16228145556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26491046400).

16228145556 is an abundant number, since it is smaller than the sum of its proper divisors (36753947244).

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

16228145556 is a wasteful number, since it uses less digits than its factorization.

16228145556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358 (or 337 counting only the distinct ones).

The product of its digits is 576000, while the sum is 45.

The spelling of 16228145556 in words is "sixteen billion, two hundred twenty-eight million, one hundred forty-five thousand, five hundred fifty-six".