11816864661013 has 2 divisors, whose sum is σ = 11816864661014. Its totient is φ = 11816864661012.

The previous prime is 11816864660977. The next prime is 11816864661071. The reversal of 11816864661013 is 31016646861811.

It is a happy number.

11816864661013 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10358465460849 + 1458399200164 = 3218457^2 + 1207642^2 .

It is a cyclic number.

It is not a de Polignac number, because 11816864661013 - 2¹⁷ = 11816864529941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11816864461013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5908432330506 + 5908432330507.

It is an arithmetic number, because the mean of its divisors is an integer number (5908432330507).

Almost surely, 2^{11816864661013} is an apocalyptic number.

It is an amenable number.

11816864661013 is a deficient number, since it is larger than the sum of its proper divisors (1).

11816864661013 is an equidigital number, since it uses as much as digits as its factorization.

11816864661013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 995328, while the sum is 52.

The spelling of 11816864661013 in words is "eleven trillion, eight hundred sixteen billion, eight hundred sixty-four million, six hundred sixty-one thousand, thirteen".