11731666027409 has 2 divisors, whose sum is σ = 11731666027410. Its totient is φ = 11731666027408.

The previous prime is 11731666027397. The next prime is 11731666027423. The reversal of 11731666027409 is 90472066613711.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11616147613009 + 115518414400 = 3408247^2 + 339880^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11731666027409 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (11731666027009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5865833013704 + 5865833013705.

It is an arithmetic number, because the mean of its divisors is an integer number (5865833013705).

Almost surely, 2^{11731666027409} is an apocalyptic number.

It is an amenable number.

11731666027409 is a deficient number, since it is larger than the sum of its proper divisors (1).

11731666027409 is an equidigital number, since it uses as much as digits as its factorization.

11731666027409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2286144, while the sum is 53.

The spelling of 11731666027409 in words is "eleven trillion, seven hundred thirty-one billion, six hundred sixty-six million, twenty-seven thousand, four hundred nine".