172740422502 has 32 divisors (see below), whose sum is σ = 385118025600. Its totient is φ = 57392577864.

The previous prime is 172740422441. The next prime is 172740422507. The reversal of 172740422502 is 205224047271.

172740422502 is a `hidden beast` number, since 1 + 7 + 27 + 404 + 225 + 0 + 2 = 666.

It is a super-3 number, since 3×172740422502³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172740422507) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5193352 + ... + 5226507.

It is an arithmetic number, because the mean of its divisors is an integer number (12034938300).

Almost surely, 2^172740422502 is an apocalyptic number.

172740422502 is an abundant number, since it is smaller than the sum of its proper divisors (212377603098).

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

172740422502 is a wasteful number, since it uses less digits than its factorization.

172740422502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10420177 (or 10420171 counting only the distinct ones).

The product of its (nonzero) digits is 62720, while the sum is 36.

Adding to 172740422502 its reverse (205224047271), we get a palindrome (377964469773).

The spelling of 172740422502 in words is "one hundred seventy-two billion, seven hundred forty million, four hundred twenty-two thousand, five hundred two".