5565005561 has 4 divisors (see below), whose sum is σ = 5589521232. Its totient is φ = 5540489892.

The previous prime is 5565005543. The next prime is 5565005597. The reversal of 5565005561 is 1655005655.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1655005655 = 5 ⋅331001131.

It is a cyclic number.

It is not a de Polignac number, because 5565005561 - 2³⁰ = 4491263737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5565005521) 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, 12257495 + ... + 12257948.

It is an arithmetic number, because the mean of its divisors is an integer number (1397380308).

Almost surely, 2^5565005561 is an apocalyptic number.

It is an amenable number.

5565005561 is a deficient number, since it is larger than the sum of its proper divisors (24515671).

5565005561 is a wasteful number, since it uses less digits than its factorization.

5565005561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24515670.

The product of its (nonzero) digits is 112500, while the sum is 38.

The square root of 5565005561 is about 74598.9648788775. The cubic root of 5565005561 is about 1772.1012593792.

The spelling of 5565005561 in words is "five billion, five hundred sixty-five million, five thousand, five hundred sixty-one".