172736252772 has 24 divisors (see below), whose sum is σ = 403572689856. Its totient is φ = 57504260448.

The previous prime is 172736252743. The next prime is 172736252779. The reversal of 172736252772 is 277252637271.

It is not an unprimeable number, because it can be changed into a prime (172736252779) 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, 9301648 + ... + 9320199.

It is an arithmetic number, because the mean of its divisors is an integer number (16815528744).

Almost surely, 2^172736252772 is an apocalyptic number.

172736252772 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

172736252772 is an abundant number, since it is smaller than the sum of its proper divisors (230836437084).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

172736252772 is a wasteful number, since it uses less digits than its factorization.

172736252772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18622627 (or 18622625 counting only the distinct ones).

The product of its digits is 3457440, while the sum is 51.

The spelling of 172736252772 in words is "one hundred seventy-two billion, seven hundred thirty-six million, two hundred fifty-two thousand, seven hundred seventy-two".