170759878918261 has 2 divisors, whose sum is σ = 170759878918262. Its totient is φ = 170759878918260.

The previous prime is 170759878918253. The next prime is 170759878918397. The reversal of 170759878918261 is 162819878957071.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 135856950981361 + 34902927936900 = 11655769^2 + 5907870^2 .

It is a cyclic number.

It is not a de Polignac number, because 170759878918261 - 2³ = 170759878918253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (170759878918561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85379939459130 + 85379939459131.

It is an arithmetic number, because the mean of its divisors is an integer number (85379939459131).

Almost surely, 2^{170759878918261} is an apocalyptic number.

It is an amenable number.

170759878918261 is a deficient number, since it is larger than the sum of its proper divisors (1).

170759878918261 is an equidigital number, since it uses as much as digits as its factorization.

170759878918261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 853493760, while the sum is 79.

The spelling of 170759878918261 in words is "one hundred seventy trillion, seven hundred fifty-nine billion, eight hundred seventy-eight million, nine hundred eighteen thousand, two hundred sixty-one".