11185603665589 has 2 divisors, whose sum is σ = 11185603665590. Its totient is φ = 11185603665588.

The previous prime is 11185603665541. The next prime is 11185603665617. The reversal of 11185603665589 is 98556630658111.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11077194810564 + 108408855025 = 3328242^2 + 329255^2 .

It is a cyclic number.

It is not a de Polignac number, because 11185603665589 - 2¹⁹ = 11185603141301 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11185603665589.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11185603669589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5592801832794 + 5592801832795.

It is an arithmetic number, because the mean of its divisors is an integer number (5592801832795).

Almost surely, 2^{11185603665589} is an apocalyptic number.

It is an amenable number.

11185603665589 is a deficient number, since it is larger than the sum of its proper divisors (1).

11185603665589 is an equidigital number, since it uses as much as digits as its factorization.

11185603665589 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656000, while the sum is 64.

The spelling of 11185603665589 in words is "eleven trillion, one hundred eighty-five billion, six hundred three million, six hundred sixty-five thousand, five hundred eighty-nine".