65441611817 has 2 divisors, whose sum is σ = 65441611818. Its totient is φ = 65441611816.

The previous prime is 65441611811. The next prime is 65441611867. The reversal of 65441611817 is 71811614456.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64229806096 + 1211805721 = 253436^2 + 34811^2 .

It is a cyclic number.

It is not a de Polignac number, because 65441611817 - 2¹⁴ = 65441595433 is a prime.

It is not a weakly prime, because it can be changed into another prime (65441611811) 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 as a sum of consecutive naturals, namely, 32720805908 + 32720805909.

It is an arithmetic number, because the mean of its divisors is an integer number (32720805909).

Almost surely, 2^65441611817 is an apocalyptic number.

It is an amenable number.

65441611817 is a deficient number, since it is larger than the sum of its proper divisors (1).

65441611817 is an equidigital number, since it uses as much as digits as its factorization.

65441611817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 161280, while the sum is 44.

The spelling of 65441611817 in words is "sixty-five billion, four hundred forty-one million, six hundred eleven thousand, eight hundred seventeen".