5580805561 has 4 divisors (see below), whose sum is σ = 5582343652. Its totient is φ = 5579267472.

The previous prime is 5580805513. The next prime is 5580805619. The reversal of 5580805561 is 1655080855.

5580805561 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 499254336 + 5081551225 = 22344^2 + 71285^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5580805561 is a prime.

It is a super-2 number, since 2×5580805561² = 62290781419377049442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5580805961) 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, 763590 + ... + 770863.

It is an arithmetic number, because the mean of its divisors is an integer number (1395585913).

Almost surely, 2^5580805561 is an apocalyptic number.

It is an amenable number.

5580805561 is a deficient number, since it is larger than the sum of its proper divisors (1538091).

5580805561 is a wasteful number, since it uses less digits than its factorization.

5580805561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1538090.

The product of its (nonzero) digits is 240000, while the sum is 43.

The square root of 5580805561 is about 74704.7894113891. The cubic root of 5580805561 is about 1773.7767739341.

The spelling of 5580805561 in words is "five billion, five hundred eighty million, eight hundred five thousand, five hundred sixty-one".