1216523037116 has 12 divisors (see below), whose sum is σ = 2132059950888. Its totient is φ = 607363051152.

The previous prime is 1216523037097. The next prime is 1216523037137. The reversal of 1216523037116 is 6117303256121.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1216523037116.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 224613806 + ... + 224619221.

It is an arithmetic number, because the mean of its divisors is an integer number (177671662574).

Almost surely, 2^{1216523037116} is an apocalyptic number.

It is an amenable number.

1216523037116 is a deficient number, since it is larger than the sum of its proper divisors (915536913772).

1216523037116 is a wasteful number, since it uses less digits than its factorization.

1216523037116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449233708 (or 449233706 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 38.

The spelling of 1216523037116 in words is "one trillion, two hundred sixteen billion, five hundred twenty-three million, thirty-seven thousand, one hundred sixteen".