171179132645 has 4 divisors (see below), whose sum is σ = 205414959180. Its totient is φ = 136943306112.

The previous prime is 171179132639. The next prime is 171179132647. The reversal of 171179132645 is 546231971171.

It is a Cunningham number, because it is equal to 413738²+1.

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

It can be written as a sum of positive squares in 2 ways, for example, as 61624090564 + 109555042081 = 248242^2 + 330991^2 .

It is a cyclic number.

It is not a de Polignac number, because 171179132645 - 2²⁶ = 171112023781 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 171179132645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171179132647) 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, 17117913260 + ... + 17117913269.

It is an arithmetic number, because the mean of its divisors is an integer number (51353739795).

Almost surely, 2^171179132645 is an apocalyptic number.

It is an amenable number.

171179132645 is a deficient number, since it is larger than the sum of its proper divisors (34235826535).

171179132645 is an equidigital number, since it uses as much as digits as its factorization.

171179132645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34235826534.

The product of its digits is 317520, while the sum is 47.

The spelling of 171179132645 in words is "one hundred seventy-one billion, one hundred seventy-nine million, one hundred thirty-two thousand, six hundred forty-five".