11891399263 has 2 divisors, whose sum is σ = 11891399264. Its totient is φ = 11891399262.

The previous prime is 11891399209. The next prime is 11891399291. The reversal of 11891399263 is 36299319811.

It is a happy number.

11891399263 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (36299319811) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11891399263 - 2²⁹ = 11354528351 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11891399263.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11891393263) 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, 5945699631 + 5945699632.

It is an arithmetic number, because the mean of its divisors is an integer number (5945699632).

Almost surely, 2^11891399263 is an apocalyptic number.

11891399263 is a deficient number, since it is larger than the sum of its proper divisors (1).

11891399263 is an equidigital number, since it uses as much as digits as its factorization.

11891399263 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 629856, while the sum is 52.

The spelling of 11891399263 in words is "eleven billion, eight hundred ninety-one million, three hundred ninety-nine thousand, two hundred sixty-three".