11643221316 has 48 divisors (see below), whose sum is σ = 27417657344. Its totient is φ = 3845421216.

The previous prime is 11643221257. The next prime is 11643221333. The reversal of 11643221316 is 61312234611.

It is a super-2 number, since 2×11643221316² (a number of 21 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1249611 + ... + 1258893.

Almost surely, 2^11643221316 is an apocalyptic number.

It is an amenable number.

11643221316 is an abundant number, since it is smaller than the sum of its proper divisors (15774436028).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11643221316 is a wasteful number, since it uses less digits than its factorization.

11643221316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10240 (or 10238 counting only the distinct ones).

The product of its digits is 5184, while the sum is 30.

Adding to 11643221316 its reverse (61312234611), we get a palindrome (72955455927).

The spelling of 11643221316 in words is "eleven billion, six hundred forty-three million, two hundred twenty-one thousand, three hundred sixteen".