11056566555 has 64 divisors (see below), whose sum is σ = 21011235840. Its totient is φ = 5502816000.

The previous prime is 11056566541. The next prime is 11056566569. The reversal of 11056566555 is 55566565011.

It is an interprime number because it is at equal distance from previous prime (11056566541) and next prime (11056566569).

It is not a de Polignac number, because 11056566555 - 2¹⁴ = 11056550171 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 11056566555.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 83880 + ... + 170730.

It is an arithmetic number, because the mean of its divisors is an integer number (328300560).

Almost surely, 2^11056566555 is an apocalyptic number.

11056566555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11056566555 is a deficient number, since it is larger than the sum of its proper divisors (9954669285).

11056566555 is a wasteful number, since it uses less digits than its factorization.

11056566555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86929 (or 86923 counting only the distinct ones).

The product of its (nonzero) digits is 675000, while the sum is 45.

The spelling of 11056566555 in words is "eleven billion, fifty-six million, five hundred sixty-six thousand, five hundred fifty-five".