172111166171 has 12 divisors (see below), whose sum is σ = 207114775920. Its totient is φ = 142436826000.

The previous prime is 172111166083. The next prime is 172111166173. The reversal of 172111166171 is 171661111271.

It is not a de Polignac number, because 172111166171 - 2²⁶ = 172044057307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172111166173) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 60558455 + ... + 60561296.

It is an arithmetic number, because the mean of its divisors is an integer number (17259564660).

Almost surely, 2^172111166171 is an apocalyptic number.

172111166171 is a deficient number, since it is larger than the sum of its proper divisors (35003609749).

172111166171 is a wasteful number, since it uses less digits than its factorization.

172111166171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121119794 (or 121119787 counting only the distinct ones).

The product of its digits is 3528, while the sum is 35.

The spelling of 172111166171 in words is "one hundred seventy-two billion, one hundred eleven million, one hundred sixty-six thousand, one hundred seventy-one".