159991825906009 has 2 divisors, whose sum is σ = 159991825906010. Its totient is φ = 159991825906008.

The previous prime is 159991825905949. The next prime is 159991825906013. The reversal of 159991825906009 is 900609528199951.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 158886730880784 + 1105095025225 = 12605028^2 + 1051235^2 .

It is a cyclic number.

It is not a de Polignac number, because 159991825906009 - 2³⁵ = 159957466167641 is a prime.

It is not a weakly prime, because it can be changed into another prime (159991825906019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79995912953004 + 79995912953005.

It is an arithmetic number, because the mean of its divisors is an integer number (79995912953005).

Almost surely, 2^{159991825906009} is an apocalyptic number.

It is an amenable number.

159991825906009 is a deficient number, since it is larger than the sum of its proper divisors (1).

159991825906009 is an equidigital number, since it uses as much as digits as its factorization.

159991825906009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 141717600, while the sum is 73.

The spelling of 159991825906009 in words is "one hundred fifty-nine trillion, nine hundred ninety-one billion, eight hundred twenty-five million, nine hundred six thousand, nine".