11866636139 has 2 divisors, whose sum is σ = 11866636140. Its totient is φ = 11866636138.

The previous prime is 11866636129. The next prime is 11866636183. The reversal of 11866636139 is 93163666811.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11866636139 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (11866636129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5933318069 + 5933318070.

It is an arithmetic number, because the mean of its divisors is an integer number (5933318070).

Almost surely, 2^11866636139 is an apocalyptic number.

11866636139 is a deficient number, since it is larger than the sum of its proper divisors (1).

11866636139 is an equidigital number, since it uses as much as digits as its factorization.

11866636139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 839808, while the sum is 50.

The spelling of 11866636139 in words is "eleven billion, eight hundred sixty-six million, six hundred thirty-six thousand, one hundred thirty-nine".