11123344556789 has 4 divisors (see below), whose sum is σ = 11152387232256. Its totient is φ = 11094301881324.

The previous prime is 11123344556783. The next prime is 11123344556827. The reversal of 11123344556789 is 98765544332111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11123344556789 - 2⁴ = 11123344556773 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 (11123344556783) 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, 14521337159 + ... + 14521337924.

It is an arithmetic number, because the mean of its divisors is an integer number (2788096808064).

Almost surely, 2^{11123344556789} is an apocalyptic number.

It is an amenable number.

11123344556789 is a deficient number, since it is larger than the sum of its proper divisors (29042675467).

11123344556789 is an equidigital number, since it uses as much as digits as its factorization.

11123344556789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29042675466.

The product of its digits is 21772800, while the sum is 59.

The spelling of 11123344556789 in words is "eleven trillion, one hundred twenty-three billion, three hundred forty-four million, five hundred fifty-six thousand, seven hundred eighty-nine".