645332004259 has 2 divisors, whose sum is σ = 645332004260. Its totient is φ = 645332004258.

The previous prime is 645332004241. The next prime is 645332004269. The reversal of 645332004259 is 952400233546.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 645332004259 - 2⁹ = 645332003747 is a prime.

It is not a weakly prime, because it can be changed into another prime (645332004269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 322666002129 + 322666002130.

It is an arithmetic number, because the mean of its divisors is an integer number (322666002130).

Almost surely, 2^645332004259 is an apocalyptic number.

645332004259 is a deficient number, since it is larger than the sum of its proper divisors (1).

645332004259 is an equidigital number, since it uses as much as digits as its factorization.

645332004259 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 777600, while the sum is 43.

The spelling of 645332004259 in words is "six hundred forty-five billion, three hundred thirty-two million, four thousand, two hundred fifty-nine".