11664432217 has 8 divisors (see below), whose sum is σ = 12128596992. Its totient is φ = 11205760800.

The previous prime is 11664432203. The next prime is 11664432271. The reversal of 11664432217 is 71223446611.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11664432217 - 2¹⁵ = 11664399449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11664432517) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1369009 + ... + 1377502.

It is an arithmetic number, because the mean of its divisors is an integer number (1516074624).

Almost surely, 2^11664432217 is an apocalyptic number.

It is an amenable number.

11664432217 is a deficient number, since it is larger than the sum of its proper divisors (464164775).

11664432217 is a wasteful number, since it uses less digits than its factorization.

11664432217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2746679.

The product of its digits is 48384, while the sum is 37.

Adding to 11664432217 its reverse (71223446611), we get a palindrome (82887878828).

The spelling of 11664432217 in words is "eleven billion, six hundred sixty-four million, four hundred thirty-two thousand, two hundred seventeen".