171192638719871 has 4 divisors (see below), whose sum is σ = 171192691693200. Its totient is φ = 171192585746544.

The previous prime is 171192638719831. The next prime is 171192638719939. The reversal of 171192638719871 is 178917836291171.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 171192638719871 - 2²⁶ = 171192571611007 is a prime.

It is a super-2 number, since 2×171192638719871² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 171192638719795 and 171192638719804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171192638719831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21300686 + ... + 28215323.

It is an arithmetic number, because the mean of its divisors is an integer number (42798172923300).

Almost surely, 2^{171192638719871} is an apocalyptic number.

171192638719871 is a deficient number, since it is larger than the sum of its proper divisors (52973329).

171192638719871 is an equidigital number, since it uses as much as digits as its factorization.

171192638719871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52973328.

The product of its digits is 64012032, while the sum is 71.

The spelling of 171192638719871 in words is "one hundred seventy-one trillion, one hundred ninety-two billion, six hundred thirty-eight million, seven hundred nineteen thousand, eight hundred seventy-one".