172167052185 has 12 divisors (see below), whose sum is σ = 298422890532. Its totient is φ = 91822427808.

The previous prime is 172167052177. The next prime is 172167052243. The reversal of 172167052185 is 581250761271.

It can be written as a sum of positive squares in 2 ways, for example, as 40347953424 + 131819098761 = 200868^2 + 363069^2 .

It is not a de Polignac number, because 172167052185 - 2³ = 172167052177 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 3825934493 = 172167052185 / (1 + 7 + 2 + 1 + 6 + 7 + 0 + 5 + 2 + 1 + 8 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 172167052185.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1912967202 + ... + 1912967291.

It is an arithmetic number, because the mean of its divisors is an integer number (24868574211).

Almost surely, 2^172167052185 is an apocalyptic number.

172167052185 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

172167052185 is a deficient number, since it is larger than the sum of its proper divisors (126255838347).

172167052185 is a wasteful number, since it uses less digits than its factorization.

172167052185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3825934504 (or 3825934501 counting only the distinct ones).

The product of its (nonzero) digits is 235200, while the sum is 45.

The spelling of 172167052185 in words is "one hundred seventy-two billion, one hundred sixty-seven million, fifty-two thousand, one hundred eighty-five".