172873619255 has 4 divisors (see below), whose sum is σ = 207448343112. Its totient is φ = 138298895400.

The previous prime is 172873619249. The next prime is 172873619257. The reversal of 172873619255 is 552916378271.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 552916378271 = 241 ⋅2294258831.

It is not a de Polignac number, because 172873619255 - 2²⁰ = 172872570679 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 172873619255.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172873619257) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17287361921 + ... + 17287361930.

It is an arithmetic number, because the mean of its divisors is an integer number (51862085778).

Almost surely, 2^172873619255 is an apocalyptic number.

172873619255 is a deficient number, since it is larger than the sum of its proper divisors (34574723857).

172873619255 is an equidigital number, since it uses as much as digits as its factorization.

172873619255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34574723856.

The product of its digits is 6350400, while the sum is 56.

The spelling of 172873619255 in words is "one hundred seventy-two billion, eight hundred seventy-three million, six hundred nineteen thousand, two hundred fifty-five".