11115555155 has 4 divisors (see below), whose sum is σ = 13338666192. Its totient is φ = 8892444120.

The previous prime is 11115555137. The next prime is 11115555181. The reversal of 11115555155 is 55155551111.

11115555155 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: 55155551111 = 17 ⋅3244444183.

It is a de Polignac number, because none of the positive numbers 2^k-11115555155 is a prime.

It is a nude number because it is divisible by every one of its digits.

It is a Duffinian number.

It is an unprimeable number.

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, 1111555511 + ... + 1111555520.

It is an arithmetic number, because the mean of its divisors is an integer number (3334666548).

Almost surely, 2^11115555155 is an apocalyptic number.

11115555155 is a deficient number, since it is larger than the sum of its proper divisors (2223111037).

11115555155 is an equidigital number, since it uses as much as digits as its factorization.

11115555155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2223111036.

The product of its digits is 15625, while the sum is 35.

The spelling of 11115555155 in words is "eleven billion, one hundred fifteen million, five hundred fifty-five thousand, one hundred fifty-five".