172765745423 has 4 divisors (see below), whose sum is σ = 174546835680. Its totient is φ = 170984655168.

The previous prime is 172765745417. The next prime is 172765745441. The reversal of 172765745423 is 324547567271.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 172765745423 - 2²² = 172761551119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172765745323) 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, 890544983 + ... + 890545176.

It is an arithmetic number, because the mean of its divisors is an integer number (43636708920).

Almost surely, 2^172765745423 is an apocalyptic number.

172765745423 is a deficient number, since it is larger than the sum of its proper divisors (1781090257).

172765745423 is an equidigital number, since it uses as much as digits as its factorization.

172765745423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1781090256.

The product of its digits is 9878400, while the sum is 53.

The spelling of 172765745423 in words is "one hundred seventy-two billion, seven hundred sixty-five million, seven hundred forty-five thousand, four hundred twenty-three".