16505206464 has 56 divisors (see below), whose sum is σ = 43889574400. Its totient is φ = 5474075904.

The previous prime is 16505206411. The next prime is 16505206477. The reversal of 16505206464 is 46460250561.

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, 177784 + ... + 254199.

It is an arithmetic number, because the mean of its divisors is an integer number (783742400).

Almost surely, 2^16505206464 is an apocalyptic number.

It is an amenable number.

16505206464 is an abundant number, since it is smaller than the sum of its proper divisors (27384367936).

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

16505206464 is a wasteful number, since it uses less digits than its factorization.

16505206464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432197 (or 432187 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 39.

The spelling of 16505206464 in words is "sixteen billion, five hundred five million, two hundred six thousand, four hundred sixty-four".