41563464661 has 2 divisors, whose sum is σ = 41563464662. Its totient is φ = 41563464660.

The previous prime is 41563464659. The next prime is 41563464689. The reversal of 41563464661 is 16646436514.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40282898436 + 1280566225 = 200706^2 + 35785^2 .

It is a cyclic number.

It is not a de Polignac number, because 41563464661 - 2¹ = 41563464659 is a prime.

Together with 41563464659, 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 (41563464641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20781732330 + 20781732331.

It is an arithmetic number, because the mean of its divisors is an integer number (20781732331).

Almost surely, 2^41563464661 is an apocalyptic number.

It is an amenable number.

41563464661 is a deficient number, since it is larger than the sum of its proper divisors (1).

41563464661 is an equidigital number, since it uses as much as digits as its factorization.

41563464661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1244160, while the sum is 46.

The spelling of 41563464661 in words is "forty-one billion, five hundred sixty-three million, four hundred sixty-four thousand, six hundred sixty-one".