65091381317 has 2 divisors, whose sum is σ = 65091381318. Its totient is φ = 65091381316.

The previous prime is 65091381283. The next prime is 65091381331. The reversal of 65091381317 is 71318319056.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51729408481 + 13361972836 = 227441^2 + 115594^2 .

It is a cyclic number.

It is not a de Polignac number, because 65091381317 - 2¹⁸ = 65091119173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65091381217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32545690658 + 32545690659.

It is an arithmetic number, because the mean of its divisors is an integer number (32545690659).

Almost surely, 2^65091381317 is an apocalyptic number.

It is an amenable number.

65091381317 is a deficient number, since it is larger than the sum of its proper divisors (1).

65091381317 is an equidigital number, since it uses as much as digits as its factorization.

65091381317 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 136080, while the sum is 44.

The spelling of 65091381317 in words is "sixty-five billion, ninety-one million, three hundred eighty-one thousand, three hundred seventeen".