5565565161 has 40 divisors (see below), whose sum is σ = 8986324424. Its totient is φ = 3412419840.

The previous prime is 5565565147. The next prime is 5565565219. The reversal of 5565565161 is 1615655655.

It can be written as a sum of positive squares in 4 ways, for example, as 145660761 + 5419904400 = 12069^2 + 73620^2 .

It is not a de Polignac number, because 5565565161 - 2¹⁴ = 5565548777 is a prime.

It is a super-2 number, since 2×5565565161² = 61951031122673911842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5565565361) 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 39 ways as a sum of consecutive naturals, for example, 282141 + ... + 301221.

Almost surely, 2^5565565161 is an apocalyptic number.

It is an amenable number.

5565565161 is a deficient number, since it is larger than the sum of its proper divisors (3420759263).

5565565161 is a wasteful number, since it uses less digits than its factorization.

5565565161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19383 (or 19374 counting only the distinct ones).

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

The square root of 5565565161 is about 74602.7155068768. The cubic root of 5565565161 is about 1772.1606564224.

The spelling of 5565565161 in words is "five billion, five hundred sixty-five million, five hundred sixty-five thousand, one hundred sixty-one".