16610728320 has 320 divisors, whose sum is σ = 60168731040. Its totient is φ = 4366172160.

The previous prime is 16610728319. The next prime is 16610728361. The reversal of 16610728320 is 2382701661.

16610728320 is a `hidden beast` number, since 1 + 6 + 610 + 7 + 2 + 8 + 32 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (320).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 3678384 + ... + 3682896.

Almost surely, 2^16610728320 is an apocalyptic number.

16610728320 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 16610728320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30084365520).

16610728320 is an abundant number, since it is smaller than the sum of its proper divisors (43558002720).

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

16610728320 is an equidigital number, since it uses as much as digits as its factorization.

16610728320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4615 (or 4594 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The spelling of 16610728320 in words is "sixteen billion, six hundred ten million, seven hundred twenty-eight thousand, three hundred twenty".