11123445557789 has 2 divisors, whose sum is σ = 11123445557790. Its totient is φ = 11123445557788.

The previous prime is 11123445557743. The next prime is 11123445557839. The reversal of 11123445557789 is 98775554432111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8368233984100 + 2755211573689 = 2892790^2 + 1659883^2 .

It is a cyclic number.

It is not a de Polignac number, because 11123445557789 - 2²⁸ = 11123177122333 is a prime.

It is a plaindrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11123445557729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5561722778894 + 5561722778895.

It is an arithmetic number, because the mean of its divisors is an integer number (5561722778895).

Almost surely, 2^{11123445557789} is an apocalyptic number.

It is an amenable number.

11123445557789 is a deficient number, since it is larger than the sum of its proper divisors (1).

11123445557789 is an equidigital number, since it uses as much as digits as its factorization.

11123445557789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42336000, while the sum is 62.

The spelling of 11123445557789 in words is "eleven trillion, one hundred twenty-three billion, four hundred forty-five million, five hundred fifty-seven thousand, seven hundred eighty-nine".