321263645441 has 2 divisors, whose sum is σ = 321263645442. Its totient is φ = 321263645440.

The previous prime is 321263645413. The next prime is 321263645453. The reversal of 321263645441 is 144546362123.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 209279715841 + 111983929600 = 457471^2 + 334640^2 .

It is an emirp because it is prime and its reverse (144546362123) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 321263645441 - 2¹⁰ = 321263644417 is a prime.

It is not a weakly prime, because it can be changed into another prime (321263645411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160631822720 + 160631822721.

It is an arithmetic number, because the mean of its divisors is an integer number (160631822721).

Almost surely, 2^321263645441 is an apocalyptic number.

It is an amenable number.

321263645441 is a deficient number, since it is larger than the sum of its proper divisors (1).

321263645441 is an equidigital number, since it uses as much as digits as its factorization.

321263645441 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 414720, while the sum is 41.

The spelling of 321263645441 in words is "three hundred twenty-one billion, two hundred sixty-three million, six hundred forty-five thousand, four hundred forty-one".