172186748180 has 12 divisors (see below), whose sum is σ = 361592171220. Its totient is φ = 68874699264.

The previous prime is 172186748147. The next prime is 172186748207. The reversal of 172186748180 is 81847681271.

It can be written as a sum of positive squares in 2 ways, for example, as 72252364804 + 99934383376 = 268798^2 + 316124^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4304668685 + ... + 4304668724.

It is an arithmetic number, because the mean of its divisors is an integer number (30132680935).

Almost surely, 2^172186748180 is an apocalyptic number.

172186748180 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172186748180 is an abundant number, since it is smaller than the sum of its proper divisors (189405423040).

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

172186748180 is a wasteful number, since it uses less digits than its factorization.

172186748180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8609337418 (or 8609337416 counting only the distinct ones).

The product of its (nonzero) digits is 1204224, while the sum is 53.

The spelling of 172186748180 in words is "one hundred seventy-two billion, one hundred eighty-six million, seven hundred forty-eight thousand, one hundred eighty".