172781627172 has 72 divisors (see below), whose sum is σ = 506445350208. Its totient is φ = 44878342080.

The previous prime is 172781627101. The next prime is 172781627201. The reversal of 172781627172 is 271726187271.

172781627172 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 8489523 + ... + 8509850.

Almost surely, 2^172781627172 is an apocalyptic number.

172781627172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

172781627172 is an abundant number, since it is smaller than the sum of its proper divisors (333663723036).

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

172781627172 is a wasteful number, since it uses less digits than its factorization.

172781627172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16999409 (or 16999396 counting only the distinct ones).

The product of its digits is 921984, while the sum is 51.

The spelling of 172781627172 in words is "one hundred seventy-two billion, seven hundred eighty-one million, six hundred twenty-seven thousand, one hundred seventy-two".