11787786719591 has 2 divisors, whose sum is σ = 11787786719592. Its totient is φ = 11787786719590.

The previous prime is 11787786719563. The next prime is 11787786719623. The reversal of 11787786719591 is 19591768778711.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11787786719591 - 2³⁴ = 11770606850407 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11787786719551) 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, 5893893359795 + 5893893359796.

It is an arithmetic number, because the mean of its divisors is an integer number (5893893359796).

Almost surely, 2^{11787786719591} is an apocalyptic number.

11787786719591 is a deficient number, since it is larger than the sum of its proper divisors (1).

11787786719591 is an equidigital number, since it uses as much as digits as its factorization.

11787786719591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 373403520, while the sum is 77.

The spelling of 11787786719591 in words is "eleven trillion, seven hundred eighty-seven billion, seven hundred eighty-six million, seven hundred nineteen thousand, five hundred ninety-one".