172306806722 has 18 divisors (see below), whose sum is σ = 264954881529. Its totient is φ = 84040360080.

The previous prime is 172306806703. The next prime is 172306806733. The reversal of 172306806722 is 227608603271.

172306806722 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 123054325681 + 49252481041 = 350791^2 + 221929^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=293519.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 24064979 + ... + 24072137.

Almost surely, 2^172306806722 is an apocalyptic number.

172306806722 is a deficient number, since it is larger than the sum of its proper divisors (92648074807).

172306806722 is an frugal number, since it uses more digits than its factorization.

172306806722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14402 (or 7202 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 44.

The spelling of 172306806722 in words is "one hundred seventy-two billion, three hundred six million, eight hundred six thousand, seven hundred twenty-two".