172063221806 has 16 divisors (see below), whose sum is σ = 295411780320. Its totient is φ = 73629816480.

The previous prime is 172063221797. The next prime is 172063221853. The reversal of 172063221806 is 608122360271.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 172063221806.

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, 9287441 + ... + 9305948.

It is an arithmetic number, because the mean of its divisors is an integer number (18463236270).

Almost surely, 2^172063221806 is an apocalyptic number.

172063221806 is a deficient number, since it is larger than the sum of its proper divisors (123348558514).

172063221806 is a wasteful number, since it uses less digits than its factorization.

172063221806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18594059.

The product of its (nonzero) digits is 48384, while the sum is 38.

The spelling of 172063221806 in words is "one hundred seventy-two billion, sixty-three million, two hundred twenty-one thousand, eight hundred six".