11115555019 has 2 divisors, whose sum is σ = 11115555020. Its totient is φ = 11115555018.

The previous prime is 11115555001. The next prime is 11115555079. The reversal of 11115555019 is 91055551111.

11115555019 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 11115555019 - 2¹¹ = 11115552971 is a prime.

It is a super-2 number, since 2×11115555019² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11115555079) 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, 5557777509 + 5557777510.

It is an arithmetic number, because the mean of its divisors is an integer number (5557777510).

Almost surely, 2^11115555019 is an apocalyptic number.

11115555019 is a deficient number, since it is larger than the sum of its proper divisors (1).

11115555019 is an equidigital number, since it uses as much as digits as its factorization.

11115555019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5625, while the sum is 34.

The spelling of 11115555019 in words is "eleven billion, one hundred fifteen million, five hundred fifty-five thousand, nineteen".