1123345667809 has 2 divisors, whose sum is σ = 1123345667810. Its totient is φ = 1123345667808.

The previous prime is 1123345667797. The next prime is 1123345667813. The reversal of 1123345667809 is 9087665433211.

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., 832970179584 + 290375488225 = 912672^2 + 538865^2 .

It is a cyclic number.

It is not a de Polignac number, because 1123345667809 - 2¹⁹ = 1123345143521 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1123345667809.

It is not a weakly prime, because it can be changed into another prime (1123345667849) 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, 561672833904 + 561672833905.

It is an arithmetic number, because the mean of its divisors is an integer number (561672833905).

It is a 1-persistent number, because it is pandigital, but 2⋅1123345667809 = 2246691335618 is not.

Almost surely, 2^{1123345667809} is an apocalyptic number.

It is an amenable number.

1123345667809 is a deficient number, since it is larger than the sum of its proper divisors (1).

1123345667809 is an equidigital number, since it uses as much as digits as its factorization.

1123345667809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6531840, while the sum is 55.

The spelling of 1123345667809 in words is "one trillion, one hundred twenty-three billion, three hundred forty-five million, six hundred sixty-seven thousand, eight hundred nine".