11116604981 has 2 divisors, whose sum is σ = 11116604982. Its totient is φ = 11116604980.

The previous prime is 11116604977. The next prime is 11116605011. The reversal of 11116604981 is 18940661111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6388804900 + 4727800081 = 79930^2 + 68759^2 .

It is a cyclic number.

It is not a de Polignac number, because 11116604981 - 2² = 11116604977 is a prime.

It is a super-3 number, since 3×11116604981³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11116604951) 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, 5558302490 + 5558302491.

It is an arithmetic number, because the mean of its divisors is an integer number (5558302491).

Almost surely, 2^11116604981 is an apocalyptic number.

It is an amenable number.

11116604981 is a deficient number, since it is larger than the sum of its proper divisors (1).

11116604981 is an equidigital number, since it uses as much as digits as its factorization.

11116604981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 38.

The spelling of 11116604981 in words is "eleven billion, one hundred sixteen million, six hundred four thousand, nine hundred eighty-one".