11181118477 has 2 divisors, whose sum is σ = 11181118478. Its totient is φ = 11181118476.

The previous prime is 11181118453. The next prime is 11181118483. The reversal of 11181118477 is 77481118111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10677295561 + 503822916 = 103331^2 + 22446^2 .

It is an emirp because it is prime and its reverse (77481118111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11181118477 - 2⁷ = 11181118349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11181118877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5590559238 + 5590559239.

It is an arithmetic number, because the mean of its divisors is an integer number (5590559239).

Almost surely, 2^11181118477 is an apocalyptic number.

It is an amenable number.

11181118477 is a deficient number, since it is larger than the sum of its proper divisors (1).

11181118477 is an equidigital number, since it uses as much as digits as its factorization.

11181118477 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12544, while the sum is 40.

The spelling of 11181118477 in words is "eleven billion, one hundred eighty-one million, one hundred eighteen thousand, four hundred seventy-seven".