11000055565 has 4 divisors (see below), whose sum is σ = 13200066684. Its totient is φ = 8800044448.

The previous prime is 11000055559. The next prime is 11000055617. The reversal of 11000055565 is 56555000011.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6288331401 + 4711724164 = 79299^2 + 68642^2 .

It is a cyclic number.

It is not a de Polignac number, because 11000055565 - 2³ = 11000055557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1100005552 + ... + 1100005561.

It is an arithmetic number, because the mean of its divisors is an integer number (3300016671).

Almost surely, 2^11000055565 is an apocalyptic number.

It is an amenable number.

11000055565 is a deficient number, since it is larger than the sum of its proper divisors (2200011119).

11000055565 is an equidigital number, since it uses as much as digits as its factorization.

11000055565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2200011118.

The product of its (nonzero) digits is 3750, while the sum is 28.

Adding to 11000055565 its reverse (56555000011), we get a palindrome (67555055576).

The spelling of 11000055565 in words is "eleven billion, fifty-five thousand, five hundred sixty-five".