171192638719873 has 4 divisors (see below), whose sum is σ = 172854703173568. Its totient is φ = 169530574266180.

The previous prime is 171192638719831. The next prime is 171192638719939. The reversal of 171192638719873 is 378917836291171.

171192638719873 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 171192638719873 - 2¹⁷ = 171192638588801 is a prime.

It is a super-2 number, since 2×171192638719873² (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 = 171192638719796 and 171192638719805.

It is not an unprimeable number, because it can be changed into a prime (171192633719873) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 831032226693 + ... + 831032226898.

It is an arithmetic number, because the mean of its divisors is an integer number (43213675793392).

Almost surely, 2^{171192638719873} is an apocalyptic number.

It is an amenable number.

171192638719873 is a deficient number, since it is larger than the sum of its proper divisors (1662064453695).

171192638719873 is a wasteful number, since it uses less digits than its factorization.

171192638719873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1662064453694.

The product of its digits is 192036096, while the sum is 73.

The spelling of 171192638719873 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-three".