42963563366509 has 2 divisors, whose sum is σ = 42963563366510. Its totient is φ = 42963563366508.

The previous prime is 42963563366483. The next prime is 42963563366561. The reversal of 42963563366509 is 90566336536924.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25813736041284 + 17149827325225 = 5080722^2 + 4141235^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42963563366509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42963563366209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21481781683254 + 21481781683255.

It is an arithmetic number, because the mean of its divisors is an integer number (21481781683255).

Almost surely, 2^{42963563366509} is an apocalyptic number.

It is an amenable number.

42963563366509 is a deficient number, since it is larger than the sum of its proper divisors (1).

42963563366509 is an equidigital number, since it uses as much as digits as its factorization.

42963563366509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 566870400, while the sum is 67.

The spelling of 42963563366509 in words is "forty-two trillion, nine hundred sixty-three billion, five hundred sixty-three million, three hundred sixty-six thousand, five hundred nine".