65455943617 has 2 divisors, whose sum is σ = 65455943618. Its totient is φ = 65455943616.

The previous prime is 65455943569. The next prime is 65455943633. The reversal of 65455943617 is 71634955456.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63606857616 + 1849086001 = 252204^2 + 43001^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65455943617 is a prime.

It is not a weakly prime, because it can be changed into another prime (65455943647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32727971808 + 32727971809.

It is an arithmetic number, because the mean of its divisors is an integer number (32727971809).

Almost surely, 2^65455943617 is an apocalyptic number.

It is an amenable number.

65455943617 is a deficient number, since it is larger than the sum of its proper divisors (1).

65455943617 is an equidigital number, since it uses as much as digits as its factorization.

65455943617 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13608000, while the sum is 55.

The spelling of 65455943617 in words is "sixty-five billion, four hundred fifty-five million, nine hundred forty-three thousand, six hundred seventeen".