11055556550 has 12 divisors (see below), whose sum is σ = 20563335276. Its totient is φ = 4422222600.

The previous prime is 11055556511. The next prime is 11055556559. The reversal of 11055556550 is 5565555011.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11055556559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 110555516 + ... + 110555615.

It is an arithmetic number, because the mean of its divisors is an integer number (1713611273).

Almost surely, 2^11055556550 is an apocalyptic number.

11055556550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11055556550 is a deficient number, since it is larger than the sum of its proper divisors (9507778726).

11055556550 is a wasteful number, since it uses less digits than its factorization.

11055556550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221111143 (or 221111138 counting only the distinct ones).

The product of its (nonzero) digits is 93750, while the sum is 38.

The spelling of 11055556550 in words is "eleven billion, fifty-five million, five hundred fifty-six thousand, five hundred fifty".