321263645407 has 2 divisors, whose sum is σ = 321263645408. Its totient is φ = 321263645406.

The previous prime is 321263645393. The next prime is 321263645411. The reversal of 321263645407 is 704546362123.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-321263645407 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321263645477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160631822703 + 160631822704.

It is an arithmetic number, because the mean of its divisors is an integer number (160631822704).

Almost surely, 2^321263645407 is an apocalyptic number.

321263645407 is a deficient number, since it is larger than the sum of its proper divisors (1).

321263645407 is an equidigital number, since it uses as much as digits as its factorization.

321263645407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 725760, while the sum is 43.

The spelling of 321263645407 in words is "three hundred twenty-one billion, two hundred sixty-three million, six hundred forty-five thousand, four hundred seven".