172420710328 has 16 divisors (see below), whose sum is σ = 326921292000. Its totient is φ = 85241699136.

The previous prime is 172420710317. The next prime is 172420710353. The reversal of 172420710328 is 823017024271.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121081248 + ... + 121082671.

It is an arithmetic number, because the mean of its divisors is an integer number (20432580750).

Almost surely, 2^172420710328 is an apocalyptic number.

It is an amenable number.

172420710328 is a deficient number, since it is larger than the sum of its proper divisors (154500581672).

172420710328 is a wasteful number, since it uses less digits than its factorization.

172420710328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242164014 (or 242164010 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 37.

Adding to 172420710328 its reverse (823017024271), we get a palindrome (995437734599).

The spelling of 172420710328 in words is "one hundred seventy-two billion, four hundred twenty million, seven hundred ten thousand, three hundred twenty-eight".