645114344041 has 2 divisors, whose sum is σ = 645114344042. Its totient is φ = 645114344040.

The previous prime is 645114344027. The next prime is 645114344087. The reversal of 645114344041 is 140443411546.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 644295182400 + 819161641 = 802680^2 + 28621^2 .

It is a cyclic number.

It is not a de Polignac number, because 645114344041 - 2¹³ = 645114335849 is a prime.

It is not a weakly prime, because it can be changed into another prime (645114344341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 322557172020 + 322557172021.

It is an arithmetic number, because the mean of its divisors is an integer number (322557172021).

Almost surely, 2^645114344041 is an apocalyptic number.

It is an amenable number.

645114344041 is a deficient number, since it is larger than the sum of its proper divisors (1).

645114344041 is an equidigital number, since it uses as much as digits as its factorization.

645114344041 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 92160, while the sum is 37.

Adding to 645114344041 its reverse (140443411546), we get a palindrome (785557755587).

The spelling of 645114344041 in words is "six hundred forty-five billion, one hundred fourteen million, three hundred forty-four thousand, forty-one".