11315978591 has 2 divisors, whose sum is σ = 11315978592. Its totient is φ = 11315978590.

The previous prime is 11315978567. The next prime is 11315978593. The reversal of 11315978591 is 19587951311.

It is a happy number.

11315978591 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 a cyclic number.

It is not a de Polignac number, because 11315978591 - 2²⁶ = 11248869727 is a prime.

Together with 11315978593, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11315978593) 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, 5657989295 + 5657989296.

It is an arithmetic number, because the mean of its divisors is an integer number (5657989296).

Almost surely, 2^11315978591 is an apocalyptic number.

11315978591 is a deficient number, since it is larger than the sum of its proper divisors (1).

11315978591 is an equidigital number, since it uses as much as digits as its factorization.

11315978591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 340200, while the sum is 50.

The spelling of 11315978591 in words is "eleven billion, three hundred fifteen million, nine hundred seventy-eight thousand, five hundred ninety-one".