65417442479981 has 2 divisors, whose sum is σ = 65417442479982. Its totient is φ = 65417442479980.

The previous prime is 65417442479911. The next prime is 65417442480007. The reversal of 65417442479981 is 18997424471456.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64450630453225 + 966812026756 = 8028115^2 + 983266^2 .

It is a cyclic number.

It is not a de Polignac number, because 65417442479981 - 2⁴² = 61019395968877 is a prime.

It is a super-2 number, since 2×65417442479981² (a number of 28 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65417442479911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32708721239990 + 32708721239991.

It is an arithmetic number, because the mean of its divisors is an integer number (32708721239991).

Almost surely, 2^{65417442479981} is an apocalyptic number.

It is an amenable number.

65417442479981 is a deficient number, since it is larger than the sum of its proper divisors (1).

65417442479981 is an equidigital number, since it uses as much as digits as its factorization.

65417442479981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 487710720, while the sum is 71.

The spelling of 65417442479981 in words is "sixty-five trillion, four hundred seventeen billion, four hundred forty-two million, four hundred seventy-nine thousand, nine hundred eighty-one".