321263645459 has 2 divisors, whose sum is σ = 321263645460. Its totient is φ = 321263645458.

The previous prime is 321263645453. The next prime is 321263645477. The reversal of 321263645459 is 954546362123.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-321263645459 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (321263645453) 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, 160631822729 + 160631822730.

It is an arithmetic number, because the mean of its divisors is an integer number (160631822730).

Almost surely, 2^321263645459 is an apocalyptic number.

321263645459 is a deficient number, since it is larger than the sum of its proper divisors (1).

321263645459 is an equidigital number, since it uses as much as digits as its factorization.

321263645459 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4665600, while the sum is 50.

The spelling of 321263645459 in words is "three hundred twenty-one billion, two hundred sixty-three million, six hundred forty-five thousand, four hundred fifty-nine".