16328783520 has 504 divisors, whose sum is σ = 67305265524. Its totient is φ = 3730987008.

The previous prime is 16328783503. The next prime is 16328783531. The reversal of 16328783520 is 2538782361.

16328783520 is a `hidden beast` number, since 1 + 632 + 8 + 7 + 8 + 3 + 5 + 2 + 0 = 666.

16328783520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 16323639696 + 5143824 = 127764^2 + 2268^2 .

It is a tau number, because it is divible by the number of its divisors (504).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 83 ways as a sum of consecutive naturals, for example, 5713932 + ... + 5716788.

Almost surely, 2^16328783520 is an apocalyptic number.

16328783520 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 16328783520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33652632762).

16328783520 is an abundant number, since it is smaller than the sum of its proper divisors (50976482004).

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

16328783520 is an equidigital number, since it uses as much as digits as its factorization.

16328783520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2904 (or 2874 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The spelling of 16328783520 in words is "sixteen billion, three hundred twenty-eight million, seven hundred eighty-three thousand, five hundred twenty".