16545550320 has 640 divisors, whose sum is σ = 64015902720. Its totient is φ = 3901685760.

The previous prime is 16545550313. The next prime is 16545550327. The reversal of 16545550320 is 2305554561.

16545550320 is a `hidden beast` number, since 1 + 65 + 45 + 550 + 3 + 2 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (16545550313) and next prime (16545550327).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16545550327) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 85728144 + ... + 85728336.

It is an arithmetic number, because the mean of its divisors is an integer number (100024848).

Almost surely, 2^16545550320 is an apocalyptic number.

16545550320 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 16545550320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32007951360).

16545550320 is an abundant number, since it is smaller than the sum of its proper divisors (47470352400).

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

16545550320 is a wasteful number, since it uses less digits than its factorization.

16545550320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342 (or 330 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 36.

The spelling of 16545550320 in words is "sixteen billion, five hundred forty-five million, five hundred fifty thousand, three hundred twenty".