11945664893 has 2 divisors, whose sum is σ = 11945664894. Its totient is φ = 11945664892.

The previous prime is 11945664883. The next prime is 11945664917. The reversal of 11945664893 is 39846654911.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11901282649 + 44382244 = 109093^2 + 6662^2 .

It is a cyclic number.

It is not a de Polignac number, because 11945664893 - 2¹⁴ = 11945648509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11945664823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5972832446 + 5972832447.

It is an arithmetic number, because the mean of its divisors is an integer number (5972832447).

Almost surely, 2^11945664893 is an apocalyptic number.

It is an amenable number.

11945664893 is a deficient number, since it is larger than the sum of its proper divisors (1).

11945664893 is an equidigital number, since it uses as much as digits as its factorization.

11945664893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5598720, while the sum is 56.

The spelling of 11945664893 in words is "eleven billion, nine hundred forty-five million, six hundred sixty-four thousand, eight hundred ninety-three".