1123345666789 has 4 divisors (see below), whose sum is σ = 1153706360524. Its totient is φ = 1092984973056.

The previous prime is 1123345666771. The next prime is 1123345666799. The reversal of 1123345666789 is 9876665433211.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 681962156100 + 441383510689 = 825810^2 + 664367^2 .

It is a cyclic number.

It is not a de Polignac number, because 1123345666789 - 2⁵ = 1123345666757 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123345666769) 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 in 3 ways as a sum of consecutive naturals, for example, 15180346812 + ... + 15180346885.

It is an arithmetic number, because the mean of its divisors is an integer number (288426590131).

Almost surely, 2^{1123345666789} is an apocalyptic number.

It is an amenable number.

1123345666789 is a deficient number, since it is larger than the sum of its proper divisors (30360693735).

1123345666789 is an equidigital number, since it uses as much as digits as its factorization.

1123345666789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30360693734.

The product of its digits is 39191040, while the sum is 61.

The spelling of 1123345666789 in words is "one trillion, one hundred twenty-three billion, three hundred forty-five million, six hundred sixty-six thousand, seven hundred eighty-nine".