11043500666509 has 2 divisors, whose sum is σ = 11043500666510. Its totient is φ = 11043500666508.

The previous prime is 11043500666507. The next prime is 11043500666531. The reversal of 11043500666509 is 90566600534011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11039737212100 + 3763454409 = 3322610^2 + 61347^2 .

It is a cyclic number.

It is not a de Polignac number, because 11043500666509 - 2¹ = 11043500666507 is a prime.

Together with 11043500666507, 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 (11043500666503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5521750333254 + 5521750333255.

It is an arithmetic number, because the mean of its divisors is an integer number (5521750333255).

Almost surely, 2^{11043500666509} is an apocalyptic number.

It is an amenable number.

11043500666509 is a deficient number, since it is larger than the sum of its proper divisors (1).

11043500666509 is an equidigital number, since it uses as much as digits as its factorization.

11043500666509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 583200, while the sum is 46.

The spelling of 11043500666509 in words is "eleven trillion, forty-three billion, five hundred million, six hundred sixty-six thousand, five hundred nine".