11105566555 has 4 divisors (see below), whose sum is σ = 13326679872. Its totient is φ = 8884453240.

The previous prime is 11105566553. The next prime is 11105566579. The reversal of 11105566555 is 55566550111.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 11105566555 - 2¹ = 11105566553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11105566553) 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, 1110556651 + ... + 1110556660.

It is an arithmetic number, because the mean of its divisors is an integer number (3331669968).

Almost surely, 2^11105566555 is an apocalyptic number.

11105566555 is a deficient number, since it is larger than the sum of its proper divisors (2221113317).

11105566555 is an equidigital number, since it uses as much as digits as its factorization.

11105566555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2221113316.

The product of its (nonzero) digits is 112500, while the sum is 40.

It can be divided in two parts, 1110556 and 6555, that added together give a palindrome (1117111).

The spelling of 11105566555 in words is "eleven billion, one hundred five million, five hundred sixty-six thousand, five hundred fifty-five".