16555336944 has 60 divisors (see below), whose sum is σ = 43591984488. Its totient is φ = 5412201600.

The previous prime is 16555336921. The next prime is 16555336979. The reversal of 16555336944 is 44963355561.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6488469 + ... + 6491019.

Almost surely, 2^16555336944 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 16555336944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21795992244).

16555336944 is an abundant number, since it is smaller than the sum of its proper divisors (27036647544).

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

16555336944 is an frugal number, since it uses more digits than its factorization.

16555336944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5166 (or 2609 counting only the distinct ones).

The product of its digits is 5832000, while the sum is 51.

The spelling of 16555336944 in words is "sixteen billion, five hundred fifty-five million, three hundred thirty-six thousand, nine hundred forty-four".