646301605717513 has 2 divisors, whose sum is σ = 646301605717514. Its totient is φ = 646301605717512.

The previous prime is 646301605717507. The next prime is 646301605717589. The reversal of 646301605717513 is 315717506103646.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 363896370340624 + 282405235376889 = 19076068^2 + 16804917^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-646301605717513 is a prime.

It is not a weakly prime, because it can be changed into another prime (646301605117513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323150802858756 + 323150802858757.

It is an arithmetic number, because the mean of its divisors is an integer number (323150802858757).

Almost surely, 2^{646301605717513} is an apocalyptic number.

It is an amenable number.

646301605717513 is a deficient number, since it is larger than the sum of its proper divisors (1).

646301605717513 is an equidigital number, since it uses as much as digits as its factorization.

646301605717513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9525600, while the sum is 55.

The spelling of 646301605717513 in words is "six hundred forty-six trillion, three hundred one billion, six hundred five million, seven hundred seventeen thousand, five hundred thirteen".