11188149809 has 2 divisors, whose sum is σ = 11188149810. Its totient is φ = 11188149808.

The previous prime is 11188149793. The next prime is 11188149811. The reversal of 11188149809 is 90894188111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7627402225 + 3560747584 = 87335^2 + 59672^2 .

It is a cyclic number.

It is not a de Polignac number, because 11188149809 - 2⁴ = 11188149793 is a prime.

It is a super-2 number, since 2×11188149809² (a number of 21 digits) contains 22 as substring.

Together with 11188149811, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (11188149899) 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, 5594074904 + 5594074905.

It is an arithmetic number, because the mean of its divisors is an integer number (5594074905).

Almost surely, 2^11188149809 is an apocalyptic number.

It is an amenable number.

11188149809 is a deficient number, since it is larger than the sum of its proper divisors (1).

11188149809 is an equidigital number, since it uses as much as digits as its factorization.

11188149809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 165888, while the sum is 50.

The spelling of 11188149809 in words is "eleven billion, one hundred eighty-eight million, one hundred forty-nine thousand, eight hundred nine".