680565480445441 has 2 divisors, whose sum is σ = 680565480445442. Its totient is φ = 680565480445440.

The previous prime is 680565480445439. The next prime is 680565480445451. The reversal of 680565480445441 is 144544084565086.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 512819983689841 + 167745496755600 = 22645529^2 + 12951660^2 .

It is a cyclic number.

It is not a de Polignac number, because 680565480445441 - 2¹ = 680565480445439 is a prime.

Together with 680565480445439, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (680565480445451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340282740222720 + 340282740222721.

It is an arithmetic number, because the mean of its divisors is an integer number (340282740222721).

Almost surely, 2^{680565480445441} is an apocalyptic number.

It is an amenable number.

680565480445441 is a deficient number, since it is larger than the sum of its proper divisors (1).

680565480445441 is an equidigital number, since it uses as much as digits as its factorization.

680565480445441 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 294912000, while the sum is 64.

The spelling of 680565480445441 in words is "six hundred eighty trillion, five hundred sixty-five billion, four hundred eighty million, four hundred forty-five thousand, four hundred forty-one".