11123445667889 has 4 divisors (see below), whose sum is σ = 11123452421220. Its totient is φ = 11123438914560.

The previous prime is 11123445667819. The next prime is 11123445667931. The reversal of 11123445667889 is 98876654432111.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 2339957614864 + 8783488053025 = 1529692^2 + 2963695^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11123445667889 is a prime.

It is a super-2 number, since 2×11123445667889² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (11123445667819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 896849 + ... + 4801169.

It is an arithmetic number, because the mean of its divisors is an integer number (2780863105305).

Almost surely, 2^{11123445667889} is an apocalyptic number.

It is an amenable number.

11123445667889 is a deficient number, since it is larger than the sum of its proper divisors (6753331).

11123445667889 is an equidigital number, since it uses as much as digits as its factorization.

11123445667889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6753330.

The product of its digits is 69672960, while the sum is 65.

The spelling of 11123445667889 in words is "eleven trillion, one hundred twenty-three billion, four hundred forty-five million, six hundred sixty-seven thousand, eight hundred eighty-nine".