16505535256 has 16 divisors (see below), whose sum is σ = 35369004240. Its totient is φ = 7073800800.

The previous prime is 16505535181. The next prime is 16505535257. The reversal of 16505535256 is 65253550561.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16505535257) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 147370795 + ... + 147370906.

It is an arithmetic number, because the mean of its divisors is an integer number (2210562765).

Almost surely, 2^16505535256 is an apocalyptic number.

It is an amenable number.

16505535256 is an abundant number, since it is smaller than the sum of its proper divisors (18863468984).

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

16505535256 is a wasteful number, since it uses less digits than its factorization.

16505535256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294741714 (or 294741710 counting only the distinct ones).

The product of its (nonzero) digits is 675000, while the sum is 43.

The spelling of 16505535256 in words is "sixteen billion, five hundred five million, five hundred thirty-five thousand, two hundred fifty-six".