5665344435649 has 2 divisors, whose sum is σ = 5665344435650. Its totient is φ = 5665344435648.

The previous prime is 5665344435589. The next prime is 5665344435743. The reversal of 5665344435649 is 9465344435665.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4175614338624 + 1489730097025 = 2043432^2 + 1220545^2 .

It is a cyclic number.

It is not a de Polignac number, because 5665344435649 - 2¹¹ = 5665344433601 is a prime.

It is a super-2 number, since 2×5665344435649² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (5665344435449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2832672217824 + 2832672217825.

It is an arithmetic number, because the mean of its divisors is an integer number (2832672217825).

Almost surely, 2^{5665344435649} is an apocalyptic number.

It is an amenable number.

5665344435649 is a deficient number, since it is larger than the sum of its proper divisors (1).

5665344435649 is an equidigital number, since it uses as much as digits as its factorization.

5665344435649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 559872000, while the sum is 64.

The spelling of 5665344435649 in words is "five trillion, six hundred sixty-five billion, three hundred forty-four million, four hundred thirty-five thousand, six hundred forty-nine".