171119559581 has 2 divisors, whose sum is σ = 171119559582. Its totient is φ = 171119559580.

The previous prime is 171119559539. The next prime is 171119559613. The reversal of 171119559581 is 185955911171.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 171119559556 + 25 = 413666^2 + 5^2 .

It is a cyclic number.

It is not a de Polignac number, because 171119559581 - 2⁶ = 171119559517 is a prime.

It is a super-2 number, since 2×171119559581² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (171119559881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85559779790 + 85559779791.

It is an arithmetic number, because the mean of its divisors is an integer number (85559779791).

Almost surely, 2^171119559581 is an apocalyptic number.

It is an amenable number.

171119559581 is a deficient number, since it is larger than the sum of its proper divisors (1).

171119559581 is an equidigital number, since it uses as much as digits as its factorization.

171119559581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 567000, while the sum is 53.

The spelling of 171119559581 in words is "one hundred seventy-one billion, one hundred nineteen million, five hundred fifty-nine thousand, five hundred eighty-one".