1123455666829 has 2 divisors, whose sum is σ = 1123455666830. Its totient is φ = 1123455666828.

The previous prime is 1123455666721. The next prime is 1123455666833. The reversal of 1123455666829 is 9286665543211.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 697562380804 + 425893286025 = 835202^2 + 652605^2 .

It is a cyclic number.

It is not a de Polignac number, because 1123455666829 - 2¹¹ = 1123455664781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1123455666859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561727833414 + 561727833415.

It is an arithmetic number, because the mean of its divisors is an integer number (561727833415).

Almost surely, 2^{1123455666829} is an apocalyptic number.

It is an amenable number.

1123455666829 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123455666829 is an equidigital number, since it uses as much as digits as its factorization.

1123455666829 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18662400, while the sum is 58.

The spelling of 1123455666829 in words is "one trillion, one hundred twenty-three billion, four hundred fifty-five million, six hundred sixty-six thousand, eight hundred twenty-nine".