1216323716 has 12 divisors (see below), whose sum is σ = 2173855488. Its totient is φ = 595222152.

The previous prime is 1216323679. The next prime is 1216323761. The reversal of 1216323716 is 6173236121.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3234716 + ... + 3235091.

It is an arithmetic number, because the mean of its divisors is an integer number (181154624).

Almost surely, 2^1216323716 is an apocalyptic number.

It is an amenable number.

1216323716 is a deficient number, since it is larger than the sum of its proper divisors (957531772).

1216323716 is a wasteful number, since it uses less digits than its factorization.

1216323716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6469858 (or 6469856 counting only the distinct ones).

The product of its digits is 9072, while the sum is 32.

The square root of 1216323716 is about 34875.8328359338. The cubic root of 1216323716 is about 1067.4553664698.

Adding to 1216323716 its reverse (6173236121), we get a palindrome (7389559837).

The spelling of 1216323716 in words is "one billion, two hundred sixteen million, three hundred twenty-three thousand, seven hundred sixteen".