11115555149 has 4 divisors (see below), whose sum is σ = 11120701020. Its totient is φ = 11110409280.

The previous prime is 11115555137. The next prime is 11115555181. The reversal of 11115555149 is 94155551111.

11115555149 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: 94155551111 = 67 ⋅1405306733.

It can be written as a sum of positive squares in 2 ways, for example, as 8826602500 + 2288952649 = 93950^2 + 47843^2 .

It is a cyclic number.

It is not a de Polignac number, because 11115555149 - 2²⁰ = 11114506573 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 (11115558149) 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, 2569694 + ... + 2574015.

It is an arithmetic number, because the mean of its divisors is an integer number (2780175255).

Almost surely, 2^11115555149 is an apocalyptic number.

It is an amenable number.

11115555149 is a deficient number, since it is larger than the sum of its proper divisors (5145871).

11115555149 is an equidigital number, since it uses as much as digits as its factorization.

11115555149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5145870.

The product of its digits is 22500, while the sum is 38.

The spelling of 11115555149 in words is "eleven billion, one hundred fifteen million, five hundred fifty-five thousand, one hundred forty-nine".