11085581979 has 6 divisors (see below), whose sum is σ = 16012507316. Its totient is φ = 7390387980.

The previous prime is 11085581957. The next prime is 11085582023. The reversal of 11085581979 is 97918558011.

It is a happy number.

11085581979 is a `hidden beast` number, since 1 + 1 + 0 + 8 + 558 + 19 + 79 = 666.

It is not a de Polignac number, because 11085581979 - 2⁷ = 11085581851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11085581909) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 615865657 + ... + 615865674.

Almost surely, 2^11085581979 is an apocalyptic number.

11085581979 is a deficient number, since it is larger than the sum of its proper divisors (4926925337).

11085581979 is a wasteful number, since it uses less digits than its factorization.

11085581979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1231731337 (or 1231731334 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 54.

The spelling of 11085581979 in words is "eleven billion, eighty-five million, five hundred eighty-one thousand, nine hundred seventy-nine".