65847347077217 has 2 divisors, whose sum is σ = 65847347077218. Its totient is φ = 65847347077216.

The previous prime is 65847347077201. The next prime is 65847347077271. The reversal of 65847347077217 is 71277074374856.

Together with next prime (65847347077271) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63768513699361 + 2078833377856 = 7985519^2 + 1441816^2 .

It is a cyclic number.

It is not a de Polignac number, because 65847347077217 - 2⁴ = 65847347077201 is a prime.

It is not a weakly prime, because it can be changed into another prime (65847347077717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32923673538608 + 32923673538609.

It is an arithmetic number, because the mean of its divisors is an integer number (32923673538609).

Almost surely, 2^{65847347077217} is an apocalyptic number.

It is an amenable number.

65847347077217 is a deficient number, since it is larger than the sum of its proper divisors (1).

65847347077217 is an equidigital number, since it uses as much as digits as its factorization.

65847347077217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 387233280, while the sum is 68.

The spelling of 65847347077217 in words is "sixty-five trillion, eight hundred forty-seven billion, three hundred forty-seven million, seventy-seven thousand, two hundred seventeen".