320266316533 has 2 divisors, whose sum is σ = 320266316534. Its totient is φ = 320266316532.

The previous prime is 320266316497. The next prime is 320266316563. The reversal of 320266316533 is 335613662023.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 225304963569 + 94961352964 = 474663^2 + 308158^2 .

It is a cyclic number.

It is not a de Polignac number, because 320266316533 - 2⁹ = 320266316021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320266316563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160133158266 + 160133158267.

It is an arithmetic number, because the mean of its divisors is an integer number (160133158267).

Almost surely, 2^320266316533 is an apocalyptic number.

It is an amenable number.

320266316533 is a deficient number, since it is larger than the sum of its proper divisors (1).

320266316533 is an equidigital number, since it uses as much as digits as its factorization.

320266316533 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 349920, while the sum is 40.

Adding to 320266316533 its reverse (335613662023), we get a palindrome (655879978556).

The spelling of 320266316533 in words is "three hundred twenty billion, two hundred sixty-six million, three hundred sixteen thousand, five hundred thirty-three".