645104563435303 has 2 divisors, whose sum is σ = 645104563435304. Its totient is φ = 645104563435302.

The previous prime is 645104563435261. The next prime is 645104563435429. The reversal of 645104563435303 is 303534365401546.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 645104563435303 - 2³⁷ = 644967124481831 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (645104563435903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 322552281717651 + 322552281717652.

It is an arithmetic number, because the mean of its divisors is an integer number (322552281717652).

Almost surely, 2^{645104563435303} is an apocalyptic number.

645104563435303 is a deficient number, since it is larger than the sum of its proper divisors (1).

645104563435303 is an equidigital number, since it uses as much as digits as its factorization.

645104563435303 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328000, while the sum is 52.

The spelling of 645104563435303 in words is "six hundred forty-five trillion, one hundred four billion, five hundred sixty-three million, four hundred thirty-five thousand, three hundred three".