16805621206 has 16 divisors (see below), whose sum is σ = 27505775808. Its totient is φ = 7637344200.

The previous prime is 16805621177. The next prime is 16805621251. The reversal of 16805621206 is 60212650861.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34021 + ... + 186463.

It is an arithmetic number, because the mean of its divisors is an integer number (1719110988).

Almost surely, 2^16805621206 is an apocalyptic number.

16805621206 is a deficient number, since it is larger than the sum of its proper divisors (10700154602).

16805621206 is a wasteful number, since it uses less digits than its factorization.

16805621206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157467.

The product of its (nonzero) digits is 34560, while the sum is 37.

The spelling of 16805621206 in words is "sixteen billion, eight hundred five million, six hundred twenty-one thousand, two hundred six".