11111115755549 has 2 divisors, whose sum is σ = 11111115755550. Its totient is φ = 11111115755548.

The previous prime is 11111115755527. The next prime is 11111115755557. The reversal of 11111115755549 is 94555751111111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10909049323225 + 202066432324 = 3302885^2 + 449518^2 .

It is an emirp because it is prime and its reverse (94555751111111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11111115755549 - 2¹² = 11111115751453 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11111115755849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5555557877774 + 5555557877775.

It is an arithmetic number, because the mean of its divisors is an integer number (5555557877775).

Almost surely, 2^{11111115755549} is an apocalyptic number.

It is an amenable number.

11111115755549 is a deficient number, since it is larger than the sum of its proper divisors (1).

11111115755549 is an equidigital number, since it uses as much as digits as its factorization.

11111115755549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 157500, while the sum is 47.

The spelling of 11111115755549 in words is "eleven trillion, one hundred eleven billion, one hundred fifteen million, seven hundred fifty-five thousand, five hundred forty-nine".