11155544011 has 4 divisors (see below), whose sum is σ = 11166039472. Its totient is φ = 11145048552.

The previous prime is 11155543981. The next prime is 11155544017. The reversal of 11155544011 is 11044555111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11044555111 = 131 ⋅84309581.

It is a cyclic number.

It is not a de Polignac number, because 11155544011 - 2¹¹ = 11155541963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11155544017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5246136 + ... + 5248261.

It is an arithmetic number, because the mean of its divisors is an integer number (2791509868).

Almost surely, 2^11155544011 is an apocalyptic number.

11155544011 is a deficient number, since it is larger than the sum of its proper divisors (10495461).

11155544011 is a wasteful number, since it uses less digits than its factorization.

11155544011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10495460.

The product of its (nonzero) digits is 2000, while the sum is 28.

The spelling of 11155544011 in words is "eleven billion, one hundred fifty-five million, five hundred forty-four thousand, eleven".