243550468169 has 2 divisors, whose sum is σ = 243550468170. Its totient is φ = 243550468168.

The previous prime is 243550468151. The next prime is 243550468171. The reversal of 243550468169 is 961864055342.

It is a happy number.

243550468169 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 223785763600 + 19764704569 = 473060^2 + 140587^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243550468169 is a prime.

It is a super-3 number, since 3×243550468169³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 243550468171, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 243550468169.

It is not a weakly prime, because it can be changed into another prime (243550461169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121775234084 + 121775234085.

It is an arithmetic number, because the mean of its divisors is an integer number (121775234085).

Almost surely, 2^243550468169 is an apocalyptic number.

It is an amenable number.

243550468169 is a deficient number, since it is larger than the sum of its proper divisors (1).

243550468169 is an equidigital number, since it uses as much as digits as its factorization.

243550468169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6220800, while the sum is 53.

The spelling of 243550468169 in words is "two hundred forty-three billion, five hundred fifty million, four hundred sixty-eight thousand, one hundred sixty-nine".