11081788117 has 2 divisors, whose sum is σ = 11081788118. Its totient is φ = 11081788116.

The previous prime is 11081788099. The next prime is 11081788127. The reversal of 11081788117 is 71188718011.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10918996036 + 162792081 = 104494^2 + 12759^2 .

It is an emirp because it is prime and its reverse (71188718011) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11081788117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11081788127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5540894058 + 5540894059.

It is an arithmetic number, because the mean of its divisors is an integer number (5540894059).

Almost surely, 2^11081788117 is an apocalyptic number.

It is an amenable number.

11081788117 is a deficient number, since it is larger than the sum of its proper divisors (1).

11081788117 is an equidigital number, since it uses as much as digits as its factorization.

11081788117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25088, while the sum is 43.

The spelling of 11081788117 in words is "eleven billion, eighty-one million, seven hundred eighty-eight thousand, one hundred seventeen".