16805559918 has 32 divisors (see below), whose sum is σ = 38418716160. Its totient is φ = 4800837600.

The previous prime is 16805559893. The next prime is 16805559923. The reversal of 16805559918 is 81995550861.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 275943 + ... + 331293.

It is an arithmetic number, because the mean of its divisors is an integer number (1200584880).

Almost surely, 2^16805559918 is an apocalyptic number.

16805559918 is an abundant number, since it is smaller than the sum of its proper divisors (21613156242).

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

16805559918 is a wasteful number, since it uses less digits than its factorization.

16805559918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62592.

The product of its (nonzero) digits is 3888000, while the sum is 57.

The spelling of 16805559918 in words is "sixteen billion, eight hundred five million, five hundred fifty-nine thousand, nine hundred eighteen".