16550421360 has 320 divisors, whose sum is σ = 59132215296. Its totient is φ = 3791692800.

The previous prime is 16550421359. The next prime is 16550421389. The reversal of 16550421360 is 6312405561.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3516769 + ... + 3521471.

Almost surely, 2^16550421360 is an apocalyptic number.

16550421360 is a gapful number since it is divisible by the number (10) 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 16550421360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29566107648).

16550421360 is an abundant number, since it is smaller than the sum of its proper divisors (42581793936).

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

16550421360 is a wasteful number, since it uses less digits than its factorization.

16550421360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4804 (or 4798 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 33.

The spelling of 16550421360 in words is "sixteen billion, five hundred fifty million, four hundred twenty-one thousand, three hundred sixty".