16305780820 has 24 divisors (see below), whose sum is σ = 39133874304. Its totient is φ = 5590553376.

The previous prime is 16305780781. The next prime is 16305780833. The reversal of 16305780820 is 2808750361.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58234792 + ... + 58235071.

It is an arithmetic number, because the mean of its divisors is an integer number (1630578096).

Almost surely, 2^16305780820 is an apocalyptic number.

16305780820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16305780820 is an abundant number, since it is smaller than the sum of its proper divisors (22828093484).

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

16305780820 is a wasteful number, since it uses less digits than its factorization.

16305780820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116469879 (or 116469877 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 40.

The spelling of 16305780820 in words is "sixteen billion, three hundred five million, seven hundred eighty thousand, eight hundred twenty".