11115505055 has 4 divisors (see below), whose sum is σ = 13338606072. Its totient is φ = 8892404040.

The previous prime is 11115505019. The next prime is 11115505057. The reversal of 11115505055 is 55050551111.

It is a happy number.

11115505055 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55050551111 = 61 ⋅902468051.

It is not a de Polignac number, because 11115505055 - 2¹⁰ = 11115504031 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11115505057) 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 in 3 ways as a sum of consecutive naturals, for example, 1111550501 + ... + 1111550510.

It is an arithmetic number, because the mean of its divisors is an integer number (3334651518).

Almost surely, 2^11115505055 is an apocalyptic number.

11115505055 is a deficient number, since it is larger than the sum of its proper divisors (2223101017).

11115505055 is an equidigital number, since it uses as much as digits as its factorization.

11115505055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2223101016.

The product of its (nonzero) digits is 3125, while the sum is 29.

The spelling of 11115505055 in words is "eleven billion, one hundred fifteen million, five hundred five thousand, fifty-five".