159509406169 has 2 divisors, whose sum is σ = 159509406170. Its totient is φ = 159509406168.

The previous prime is 159509406167. The next prime is 159509406181. The reversal of 159509406169 is 961604905951.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82089126144 + 77420280025 = 286512^2 + 278245^2 .

It is a cyclic number.

It is not a de Polignac number, because 159509406169 - 2¹ = 159509406167 is a prime.

It is a super-2 number, since 2×159509406169² (a number of 23 digits) contains 22 as substring.

Together with 159509406167, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (159509406167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79754703084 + 79754703085.

It is an arithmetic number, because the mean of its divisors is an integer number (79754703085).

Almost surely, 2^159509406169 is an apocalyptic number.

It is an amenable number.

159509406169 is a deficient number, since it is larger than the sum of its proper divisors (1).

159509406169 is an equidigital number, since it uses as much as digits as its factorization.

159509406169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2624400, while the sum is 55.

The spelling of 159509406169 in words is "one hundred fifty-nine billion, five hundred nine million, four hundred six thousand, one hundred sixty-nine".