11155566791 has 2 divisors, whose sum is σ = 11155566792. Its totient is φ = 11155566790.

The previous prime is 11155566769. The next prime is 11155566803. The reversal of 11155566791 is 19766555111.

11155566791 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11155566791 - 2²² = 11151372487 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11155566091) by changing a digit.

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 as a sum of consecutive naturals, namely, 5577783395 + 5577783396.

It is an arithmetic number, because the mean of its divisors is an integer number (5577783396).

Almost surely, 2^11155566791 is an apocalyptic number.

11155566791 is a deficient number, since it is larger than the sum of its proper divisors (1).

11155566791 is an equidigital number, since it uses as much as digits as its factorization.

11155566791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 283500, while the sum is 47.

The spelling of 11155566791 in words is "eleven billion, one hundred fifty-five million, five hundred sixty-six thousand, seven hundred ninety-one".