16805473791 has 16 divisors (see below), whose sum is σ = 22736340576. Its totient is φ = 11040275456.

The previous prime is 16805473781. The next prime is 16805473793. The reversal of 16805473791 is 19737450861.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 16805473791 - 2¹⁴ = 16805457407 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16805473793) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84630 + ... + 201923.

It is an arithmetic number, because the mean of its divisors is an integer number (1421021286).

Almost surely, 2^16805473791 is an apocalyptic number.

16805473791 is a deficient number, since it is larger than the sum of its proper divisors (5930866785).

16805473791 is a wasteful number, since it uses less digits than its factorization.

16805473791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286842.

The product of its (nonzero) digits is 1270080, while the sum is 51.

The spelling of 16805473791 in words is "sixteen billion, eight hundred five million, four hundred seventy-three thousand, seven hundred ninety-one".