11118668689 has 2 divisors, whose sum is σ = 11118668690. Its totient is φ = 11118668688.

The previous prime is 11118668663. The next prime is 11118668699. The reversal of 11118668689 is 98686681111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10181819025 + 936849664 = 100905^2 + 30608^2 .

It is an emirp because it is prime and its reverse (98686681111) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11118668689 is a prime.

It is not a weakly prime, because it can be changed into another prime (11118668699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5559334344 + 5559334345.

It is an arithmetic number, because the mean of its divisors is an integer number (5559334345).

Almost surely, 2^11118668689 is an apocalyptic number.

It is an amenable number.

11118668689 is a deficient number, since it is larger than the sum of its proper divisors (1).

11118668689 is an equidigital number, since it uses as much as digits as its factorization.

11118668689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 995328, while the sum is 55.

The spelling of 11118668689 in words is "eleven billion, one hundred eighteen million, six hundred sixty-eight thousand, six hundred eighty-nine".