172195645238 has 16 divisors (see below), whose sum is σ = 261996283296. Its totient is φ = 84864151680.

The previous prime is 172195645231. The next prime is 172195645241. The reversal of 172195645238 is 832546591271.

It is a self number, because there is not a number n which added to its sum of digits gives 172195645238.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172195645231) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 433070 + ... + 729342.

It is an arithmetic number, because the mean of its divisors is an integer number (16374767706).

Almost surely, 2^172195645238 is an apocalyptic number.

172195645238 is a deficient number, since it is larger than the sum of its proper divisors (89800638058).

172195645238 is a wasteful number, since it uses less digits than its factorization.

172195645238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300439.

The product of its digits is 3628800, while the sum is 53.

The spelling of 172195645238 in words is "one hundred seventy-two billion, one hundred ninety-five million, six hundred forty-five thousand, two hundred thirty-eight".