16505210512 has 80 divisors (see below), whose sum is σ = 38788803072. Its totient is φ = 6641786880.

The previous prime is 16505210503. The next prime is 16505210549. The reversal of 16505210512 is 21501250561.

16505210512 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (28).

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, 810568 + ... + 830680.

Almost surely, 2^16505210512 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16505210512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19394401536).

16505210512 is an abundant number, since it is smaller than the sum of its proper divisors (22283592560).

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

16505210512 is a wasteful number, since it uses less digits than its factorization.

16505210512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20576 (or 20570 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 28.

The spelling of 16505210512 in words is "sixteen billion, five hundred five million, two hundred ten thousand, five hundred twelve".