11665635656 has 16 divisors (see below), whose sum is σ = 23024281200. Its totient is φ = 5525827344.

The previous prime is 11665635629. The next prime is 11665635661. The reversal of 11665635656 is 65653656611.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38373650 + ... + 38373953.

It is an arithmetic number, because the mean of its divisors is an integer number (1439017575).

Almost surely, 2^11665635656 is an apocalyptic number.

It is an amenable number.

11665635656 is a deficient number, since it is larger than the sum of its proper divisors (11358645544).

11665635656 is a wasteful number, since it uses less digits than its factorization.

11665635656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76747628 (or 76747624 counting only the distinct ones).

The product of its digits is 2916000, while the sum is 50.

The spelling of 11665635656 in words is "eleven billion, six hundred sixty-five million, six hundred thirty-five thousand, six hundred fifty-six".