11943195911 has 2 divisors, whose sum is σ = 11943195912. Its totient is φ = 11943195910.

The previous prime is 11943195899. The next prime is 11943195919. The reversal of 11943195911 is 11959134911.

It is a strong prime.

It is an emirp because it is prime and its reverse (11959134911) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11943195911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11943195919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5971597955 + 5971597956.

It is an arithmetic number, because the mean of its divisors is an integer number (5971597956).

Almost surely, 2^11943195911 is an apocalyptic number.

11943195911 is a deficient number, since it is larger than the sum of its proper divisors (1).

11943195911 is an equidigital number, since it uses as much as digits as its factorization.

11943195911 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43740, while the sum is 44.

The spelling of 11943195911 in words is "eleven billion, nine hundred forty-three million, one hundred ninety-five thousand, nine hundred eleven".