171243432548261 has 2 divisors, whose sum is σ = 171243432548262. Its totient is φ = 171243432548260.

The previous prime is 171243432548249. The next prime is 171243432548269. The reversal of 171243432548261 is 162845234342171.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 167329488648100 + 3913943900161 = 12935590^2 + 1978369^2 .

It is a cyclic number.

It is not a de Polignac number, because 171243432548261 - 2¹⁴ = 171243432531877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (171243432548269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85621716274130 + 85621716274131.

It is an arithmetic number, because the mean of its divisors is an integer number (85621716274131).

Almost surely, 2^{171243432548261} is an apocalyptic number.

It is an amenable number.

171243432548261 is a deficient number, since it is larger than the sum of its proper divisors (1).

171243432548261 is an equidigital number, since it uses as much as digits as its factorization.

171243432548261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7741440, while the sum is 53.

The spelling of 171243432548261 in words is "one hundred seventy-one trillion, two hundred forty-three billion, four hundred thirty-two million, five hundred forty-eight thousand, two hundred sixty-one".