11865046618891 has 2 divisors, whose sum is σ = 11865046618892. Its totient is φ = 11865046618890.

The previous prime is 11865046618883. The next prime is 11865046618933. The reversal of 11865046618891 is 19881664056811.

11865046618891 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 is an emirp because it is prime and its reverse (19881664056811) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11865046618891 - 2³ = 11865046618883 is a prime.

It is not a weakly prime, because it can be changed into another prime (11865046618391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5932523309445 + 5932523309446.

It is an arithmetic number, because the mean of its divisors is an integer number (5932523309446).

Almost surely, 2^{11865046618891} is an apocalyptic number.

11865046618891 is a deficient number, since it is larger than the sum of its proper divisors (1).

11865046618891 is an equidigital number, since it uses as much as digits as its factorization.

11865046618891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19906560, while the sum is 64.

The spelling of 11865046618891 in words is "eleven trillion, eight hundred sixty-five billion, forty-six million, six hundred eighteen thousand, eight hundred ninety-one".