645245344363 has 2 divisors, whose sum is σ = 645245344364. Its totient is φ = 645245344362.

The previous prime is 645245344273. The next prime is 645245344423. The reversal of 645245344363 is 363443542546.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-645245344363 is a prime.

It is not a weakly prime, because it can be changed into another prime (645245354363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 322622672181 + 322622672182.

It is an arithmetic number, because the mean of its divisors is an integer number (322622672182).

Almost surely, 2^645245344363 is an apocalyptic number.

645245344363 is a deficient number, since it is larger than the sum of its proper divisors (1).

645245344363 is an equidigital number, since it uses as much as digits as its factorization.

645245344363 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12441600, while the sum is 49.

The spelling of 645245344363 in words is "six hundred forty-five billion, two hundred forty-five million, three hundred forty-four thousand, three hundred sixty-three".