5645566081 has 2 divisors, whose sum is σ = 5645566082. Its totient is φ = 5645566080.

The previous prime is 5645566051. The next prime is 5645566109. The reversal of 5645566081 is 1806655465.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5607014400 + 38551681 = 74880^2 + 6209^2 .

It is a cyclic number.

It is not a de Polignac number, because 5645566081 - 2¹¹ = 5645564033 is a prime.

It is a super-2 number, since 2×5645566081² = 63744832749875397122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (5645566051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2822783040 + 2822783041.

It is an arithmetic number, because the mean of its divisors is an integer number (2822783041).

Almost surely, 2^5645566081 is an apocalyptic number.

It is an amenable number.

5645566081 is a deficient number, since it is larger than the sum of its proper divisors (1).

5645566081 is an equidigital number, since it uses as much as digits as its factorization.

5645566081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864000, while the sum is 46.

The square root of 5645566081 is about 75136.9821126721. The cubic root of 5645566081 is about 1780.6114636421.

The spelling of 5645566081 in words is "five billion, six hundred forty-five million, five hundred sixty-six thousand, eighty-one".