11185603665601 has 4 divisors (see below), whose sum is σ = 11185698033604. Its totient is φ = 11185509297600.

The previous prime is 11185603665589. The next prime is 11185603665617. The reversal of 11185603665601 is 10656630658111.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2180202855601 + 9005400810000 = 1476551^2 + 3000900^2 .

It is a cyclic number.

It is not a de Polignac number, because 11185603665601 - 2⁴³ = 2389510643393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11185603662601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47005980 + ... + 47243341.

It is an arithmetic number, because the mean of its divisors is an integer number (2796424508401).

Almost surely, 2^{11185603665601} is an apocalyptic number.

It is an amenable number.

11185603665601 is a deficient number, since it is larger than the sum of its proper divisors (94368003).

11185603665601 is an equidigital number, since it uses as much as digits as its factorization.

11185603665601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94368002.

The product of its (nonzero) digits is 777600, while the sum is 49.

The spelling of 11185603665601 in words is "eleven trillion, one hundred eighty-five billion, six hundred three million, six hundred sixty-five thousand, six hundred one".