11665500163 has 4 divisors (see below), whose sum is σ = 11707614160. Its totient is φ = 11623386168.

The previous prime is 11665500139. The next prime is 11665500211. The reversal of 11665500163 is 36100556611.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11665500163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11665500463) 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, 21056583 + ... + 21057136.

It is an arithmetic number, because the mean of its divisors is an integer number (2926903540).

Almost surely, 2^11665500163 is an apocalyptic number.

11665500163 is a deficient number, since it is larger than the sum of its proper divisors (42113997).

11665500163 is an equidigital number, since it uses as much as digits as its factorization.

11665500163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42113996.

The product of its (nonzero) digits is 16200, while the sum is 34.

The spelling of 11665500163 in words is "eleven billion, six hundred sixty-five million, five hundred thousand, one hundred sixty-three".