171179132647 has 2 divisors, whose sum is σ = 171179132648. Its totient is φ = 171179132646.

The previous prime is 171179132639. The next prime is 171179132693. The reversal of 171179132647 is 746231971171.

It is a weak prime.

It is an emirp because it is prime and its reverse (746231971171) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 171179132647 - 2³ = 171179132639 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 171179132647.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (171179132617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85589566323 + 85589566324.

It is an arithmetic number, because the mean of its divisors is an integer number (85589566324).

Almost surely, 2^171179132647 is an apocalyptic number.

171179132647 is a deficient number, since it is larger than the sum of its proper divisors (1).

171179132647 is an equidigital number, since it uses as much as digits as its factorization.

171179132647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 444528, while the sum is 49.

The spelling of 171179132647 in words is "one hundred seventy-one billion, one hundred seventy-nine million, one hundred thirty-two thousand, six hundred forty-seven".