11866287613 has 2 divisors, whose sum is σ = 11866287614. Its totient is φ = 11866287612.

The previous prime is 11866287553. The next prime is 11866287661. The reversal of 11866287613 is 31678266811.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11621271204 + 245016409 = 107802^2 + 15653^2 .

It is a cyclic number.

It is not a de Polignac number, because 11866287613 - 2⁹ = 11866287101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11866287413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5933143806 + 5933143807.

It is an arithmetic number, because the mean of its divisors is an integer number (5933143807).

Almost surely, 2^11866287613 is an apocalyptic number.

It is an amenable number.

11866287613 is a deficient number, since it is larger than the sum of its proper divisors (1).

11866287613 is an equidigital number, since it uses as much as digits as its factorization.

11866287613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 580608, while the sum is 49.

The spelling of 11866287613 in words is "eleven billion, eight hundred sixty-six million, two hundred eighty-seven thousand, six hundred thirteen".