1123445567785 has 4 divisors (see below), whose sum is σ = 1348134681348. Its totient is φ = 898756454224.

The previous prime is 1123445567779. The next prime is 1123445567791. The reversal of 1123445567785 is 5877655443211.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (1123445567779) and next prime (1123445567791).

It can be written as a sum of positive squares in 2 ways, for example, as 627677492121 + 495768075664 = 792261^2 + 704108^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1123445567785 is a prime.

It is a super-2 number, since 2×1123445567785² (a number of 25 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 112344556774 + ... + 112344556783.

It is an arithmetic number, because the mean of its divisors is an integer number (337033670337).

Almost surely, 2^{1123445567785} is an apocalyptic number.

It is an amenable number.

1123445567785 is a deficient number, since it is larger than the sum of its proper divisors (224689113563).

1123445567785 is an equidigital number, since it uses as much as digits as its factorization.

1123445567785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224689113562.

The product of its digits is 28224000, while the sum is 58.

The spelling of 1123445567785 in words is "one trillion, one hundred twenty-three billion, four hundred forty-five million, five hundred sixty-seven thousand, seven hundred eighty-five".