5665561115549 has 2 divisors, whose sum is σ = 5665561115550. Its totient is φ = 5665561115548.

The previous prime is 5665561115377. The next prime is 5665561115579. The reversal of 5665561115549 is 9455111655665.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5177868393049 + 487692722500 = 2275493^2 + 698350^2 .

It is a cyclic number.

It is not a de Polignac number, because 5665561115549 - 2³⁶ = 5596841638813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5665561115579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2832780557774 + 2832780557775.

It is an arithmetic number, because the mean of its divisors is an integer number (2832780557775).

Almost surely, 2^{5665561115549} is an apocalyptic number.

It is an amenable number.

5665561115549 is a deficient number, since it is larger than the sum of its proper divisors (1).

5665561115549 is an equidigital number, since it uses as much as digits as its factorization.

5665561115549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24300000, while the sum is 59.

The spelling of 5665561115549 in words is "five trillion, six hundred sixty-five billion, five hundred sixty-one million, one hundred fifteen thousand, five hundred forty-nine".