11155116566611 has 2 divisors, whose sum is σ = 11155116566612. Its totient is φ = 11155116566610.

The previous prime is 11155116566533. The next prime is 11155116566623. The reversal of 11155116566611 is 11666561155111.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11155116566611 - 2⁷ = 11155116566483 is a prime.

It is a super-2 number, since 2×11155116566611² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11155116566681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5577558283305 + 5577558283306.

It is an arithmetic number, because the mean of its divisors is an integer number (5577558283306).

Almost surely, 2^{11155116566611} is an apocalyptic number.

11155116566611 is a deficient number, since it is larger than the sum of its proper divisors (1).

11155116566611 is an equidigital number, since it uses as much as digits as its factorization.

11155116566611 is an evil number, because the sum of its binary digits is even.

The product of its digits is 162000, while the sum is 46.

The spelling of 11155116566611 in words is "eleven trillion, one hundred fifty-five billion, one hundred sixteen million, five hundred sixty-six thousand, six hundred eleven".