1216816343404 has 6 divisors (see below), whose sum is σ = 2129428600964. Its totient is φ = 608408171700.

The previous prime is 1216816343399. The next prime is 1216816343429. The reversal of 1216816343404 is 4043436186121.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152102042922 + ... + 152102042929.

Almost surely, 2^{1216816343404} is an apocalyptic number.

It is an amenable number.

1216816343404 is a deficient number, since it is larger than the sum of its proper divisors (912612257560).

1216816343404 is a wasteful number, since it uses less digits than its factorization.

1216816343404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304204085855 (or 304204085853 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 43.

The spelling of 1216816343404 in words is "one trillion, two hundred sixteen billion, eight hundred sixteen million, three hundred forty-three thousand, four hundred four".