11565761671 has 2 divisors, whose sum is σ = 11565761672. Its totient is φ = 11565761670.

The previous prime is 11565761653. The next prime is 11565761677. The reversal of 11565761671 is 17616756511.

11565761671 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 11565761671 - 2¹⁷ = 11565630599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11565761677) 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, 5782880835 + 5782880836.

It is an arithmetic number, because the mean of its divisors is an integer number (5782880836).

Almost surely, 2^11565761671 is an apocalyptic number.

11565761671 is a deficient number, since it is larger than the sum of its proper divisors (1).

11565761671 is an equidigital number, since it uses as much as digits as its factorization.

11565761671 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 264600, while the sum is 46.

The spelling of 11565761671 in words is "eleven billion, five hundred sixty-five million, seven hundred sixty-one thousand, six hundred seventy-one".