1216081423824 has 80 divisors (see below), whose sum is σ = 3166215117120. Its totient is φ = 402178416640.

The previous prime is 1216081423811. The next prime is 1216081423841. The reversal of 1216081423824 is 4283241806121.

It is a super-2 number, since 2×1216081423824² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 32911792 + ... + 32948720.

It is an arithmetic number, because the mean of its divisors is an integer number (39577688964).

Almost surely, 2^{1216081423824} is an apocalyptic number.

It is an amenable number.

1216081423824 is an abundant number, since it is smaller than the sum of its proper divisors (1950133693296).

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

1216081423824 is a wasteful number, since it uses less digits than its factorization.

1216081423824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42308 (or 42302 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 42.

The spelling of 1216081423824 in words is "one trillion, two hundred sixteen billion, eighty-one million, four hundred twenty-three thousand, eight hundred twenty-four".