1216853688224 has 24 divisors (see below), whose sum is σ = 2395899596160. Its totient is φ = 608371251136.

The previous prime is 1216853688217. The next prime is 1216853688227. The reversal of 1216853688224 is 4228863586121.

It is a self number, because there is not a number n which added to its sum of digits gives 1216853688224.

It is not an unprimeable number, because it can be changed into a prime (1216853688227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1380464 + ... + 2083119.

It is an arithmetic number, because the mean of its divisors is an integer number (99829149840).

Almost surely, 2^{1216853688224} is an apocalyptic number.

It is an amenable number.

1216853688224 is a deficient number, since it is larger than the sum of its proper divisors (1179045907936).

1216853688224 is a wasteful number, since it uses less digits than its factorization.

1216853688224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3474572 (or 3474564 counting only the distinct ones).

The product of its digits is 8847360, while the sum is 56.

The spelling of 1216853688224 in words is "one trillion, two hundred sixteen billion, eight hundred fifty-three million, six hundred eighty-eight thousand, two hundred twenty-four".