646306436341333 has 2 divisors, whose sum is σ = 646306436341334. Its totient is φ = 646306436341332.

The previous prime is 646306436341331. The next prime is 646306436341361. The reversal of 646306436341333 is 333143634603646.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 568853887032964 + 77452549308369 = 23850658^2 + 8800713^2 .

It is a cyclic number.

It is not a de Polignac number, because 646306436341333 - 2¹ = 646306436341331 is a prime.

Together with 646306436341331, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (646306436341331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323153218170666 + 323153218170667.

It is an arithmetic number, because the mean of its divisors is an integer number (323153218170667).

Almost surely, 2^{646306436341333} is an apocalyptic number.

It is an amenable number.

646306436341333 is a deficient number, since it is larger than the sum of its proper divisors (1).

646306436341333 is an equidigital number, since it uses as much as digits as its factorization.

646306436341333 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60466176, while the sum is 55.

The spelling of 646306436341333 in words is "six hundred forty-six trillion, three hundred six billion, four hundred thirty-six million, three hundred forty-one thousand, three hundred thirty-three".