16979720806 has 16 divisors (see below), whose sum is σ = 26394692400. Its totient is φ = 8182531168.

The previous prime is 16979720789. The next prime is 16979720809. The reversal of 16979720806 is 60802797961.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16979720809) by changing a digit.

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, 227341 + ... + 292648.

It is an arithmetic number, because the mean of its divisors is an integer number (1649668275).

Almost surely, 2^16979720806 is an apocalyptic number.

16979720806 is a deficient number, since it is larger than the sum of its proper divisors (9414971594).

16979720806 is a wasteful number, since it uses less digits than its factorization.

16979720806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 520583.

The product of its (nonzero) digits is 2286144, while the sum is 55.

The spelling of 16979720806 in words is "sixteen billion, nine hundred seventy-nine million, seven hundred twenty thousand, eight hundred six".