172385200405 has 16 divisors (see below), whose sum is σ = 225675961344. Its totient is φ = 125366575680.

The previous prime is 172385200391. The next prime is 172385200433. The reversal of 172385200405 is 504002583271.

It is not a de Polignac number, because 172385200405 - 2⁷ = 172385200277 is a prime.

It is a Duffinian number.

It is a congruent 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 15 ways as a sum of consecutive naturals, for example, 3008332 + ... + 3065098.

It is an arithmetic number, because the mean of its divisors is an integer number (14104747584).

Almost surely, 2^172385200405 is an apocalyptic number.

It is an amenable number.

172385200405 is a deficient number, since it is larger than the sum of its proper divisors (53290760939).

172385200405 is a wasteful number, since it uses less digits than its factorization.

172385200405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111996.

The product of its (nonzero) digits is 67200, while the sum is 37.

Adding to 172385200405 its reverse (504002583271), we get a palindrome (676387783676).

The spelling of 172385200405 in words is "one hundred seventy-two billion, three hundred eighty-five million, two hundred thousand, four hundred five".