645312043063 has 2 divisors, whose sum is σ = 645312043064. Its totient is φ = 645312043062.

The previous prime is 645312043009. The next prime is 645312043091. The reversal of 645312043063 is 360340213546.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 645312043063 - 2³³ = 636722108471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (645312343063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 322656021531 + 322656021532.

It is an arithmetic number, because the mean of its divisors is an integer number (322656021532).

Almost surely, 2^645312043063 is an apocalyptic number.

645312043063 is a deficient number, since it is larger than the sum of its proper divisors (1).

645312043063 is an equidigital number, since it uses as much as digits as its factorization.

645312043063 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 155520, while the sum is 37.

The spelling of 645312043063 in words is "six hundred forty-five billion, three hundred twelve million, forty-three thousand, sixty-three".