172578349212 has 24 divisors (see below), whose sum is σ = 403361891856. Its totient is φ = 57429105408.

The previous prime is 172578349187. The next prime is 172578349231. The reversal of 172578349212 is 212943875271.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12118963 + ... + 12133194.

It is an arithmetic number, because the mean of its divisors is an integer number (16806745494).

Almost surely, 2^172578349212 is an apocalyptic number.

172578349212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

172578349212 is an abundant number, since it is smaller than the sum of its proper divisors (230783542644).

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

172578349212 is a wasteful number, since it uses less digits than its factorization.

172578349212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24252757 (or 24252755 counting only the distinct ones).

The product of its digits is 1693440, while the sum is 51.

The spelling of 172578349212 in words is "one hundred seventy-two billion, five hundred seventy-eight million, three hundred forty-nine thousand, two hundred twelve".