16505505830 has 32 divisors (see below), whose sum is σ = 32450181120. Its totient is φ = 5994711520.

The previous prime is 16505505781. The next prime is 16505505857. The reversal of 16505505830 is 3850550561.

16505505830 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 251 + ... + 181689.

It is an arithmetic number, because the mean of its divisors is an integer number (1014068160).

Almost surely, 2^16505505830 is an apocalyptic number.

16505505830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16505505830 is a deficient number, since it is larger than the sum of its proper divisors (15944675290).

16505505830 is a wasteful number, since it uses less digits than its factorization.

16505505830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182284.

The product of its (nonzero) digits is 90000, while the sum is 38.

The spelling of 16505505830 in words is "sixteen billion, five hundred five million, five hundred five thousand, eight hundred thirty".