11155428887 has 2 divisors, whose sum is σ = 11155428888. Its totient is φ = 11155428886.

The previous prime is 11155428877. The next prime is 11155428901. The reversal of 11155428887 is 78882455111.

11155428887 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11155428887 - 2³² = 6860461591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11155428847) 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, 5577714443 + 5577714444.

It is an arithmetic number, because the mean of its divisors is an integer number (5577714444).

Almost surely, 2^11155428887 is an apocalyptic number.

11155428887 is a deficient number, since it is larger than the sum of its proper divisors (1).

11155428887 is an equidigital number, since it uses as much as digits as its factorization.

11155428887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 716800, while the sum is 50.

The spelling of 11155428887 in words is "eleven billion, one hundred fifty-five million, four hundred twenty-eight thousand, eight hundred eighty-seven".