199972604806 has 16 divisors (see below), whose sum is σ = 323236799424. Its totient is φ = 92236725504.

The previous prime is 199972604779. The next prime is 199972604809. The reversal of 199972604806 is 608406279991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199972604809) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2388171 + ... + 2470486.

It is an arithmetic number, because the mean of its divisors is an integer number (20202299964).

Almost surely, 2^199972604806 is an apocalyptic number.

199972604806 is a deficient number, since it is larger than the sum of its proper divisors (123264194618).

199972604806 is a wasteful number, since it uses less digits than its factorization.

199972604806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4860255.

The product of its (nonzero) digits is 11757312, while the sum is 61.

The spelling of 199972604806 in words is "one hundred ninety-nine billion, nine hundred seventy-two million, six hundred four thousand, eight hundred six".