65342640778297 has 2 divisors, whose sum is σ = 65342640778298. Its totient is φ = 65342640778296.

The previous prime is 65342640778223. The next prime is 65342640778319. The reversal of 65342640778297 is 79287704624356.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64951091482176 + 391549296121 = 8059224^2 + 625739^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65342640778297 is a prime.

It is not a weakly prime, because it can be changed into another prime (65342640778997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32671320389148 + 32671320389149.

It is an arithmetic number, because the mean of its divisors is an integer number (32671320389149).

Almost surely, 2^{65342640778297} is an apocalyptic number.

It is an amenable number.

65342640778297 is a deficient number, since it is larger than the sum of its proper divisors (1).

65342640778297 is an equidigital number, since it uses as much as digits as its factorization.

65342640778297 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 853493760, while the sum is 70.

The spelling of 65342640778297 in words is "sixty-five trillion, three hundred forty-two billion, six hundred forty million, seven hundred seventy-eight thousand, two hundred ninety-seven".