165043324521133 has 2 divisors, whose sum is σ = 165043324521134. Its totient is φ = 165043324521132.

The previous prime is 165043324521029. The next prime is 165043324521139. The reversal of 165043324521133 is 331125423340561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 164466312611364 + 577011909769 = 12824442^2 + 759613^2 .

It is a cyclic number.

It is not a de Polignac number, because 165043324521133 - 2²¹ = 165043322423981 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 165043324521133.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165043324521139) 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, 82521662260566 + 82521662260567.

It is an arithmetic number, because the mean of its divisors is an integer number (82521662260567).

Almost surely, 2^{165043324521133} is an apocalyptic number.

It is an amenable number.

165043324521133 is a deficient number, since it is larger than the sum of its proper divisors (1).

165043324521133 is an equidigital number, since it uses as much as digits as its factorization.

165043324521133 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 777600, while the sum is 43.

Adding to 165043324521133 its reverse (331125423340561), we get a palindrome (496168747861694).

The spelling of 165043324521133 in words is "one hundred sixty-five trillion, forty-three billion, three hundred twenty-four million, five hundred twenty-one thousand, one hundred thirty-three".