1216603268424 has 128 divisors (see below), whose sum is σ = 3389747356800. Its totient is φ = 404300897280.

The previous prime is 1216603268393. The next prime is 1216603268477. The reversal of 1216603268424 is 4248623066121.

1216603268424 is a `hidden beast` number, since 1 + 2 + 16 + 603 + 2 + 6 + 8 + 4 + 24 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 1216603268424.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 116338204 + ... + 116348660.

It is an arithmetic number, because the mean of its divisors is an integer number (26482401225).

Almost surely, 2^{1216603268424} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1216603268424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1694873678400).

1216603268424 is an abundant number, since it is smaller than the sum of its proper divisors (2173144088376).

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

1216603268424 is a wasteful number, since it uses less digits than its factorization.

1216603268424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12060 (or 12050 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 45.

The spelling of 1216603268424 in words is "one trillion, two hundred sixteen billion, six hundred three million, two hundred sixty-eight thousand, four hundred twenty-four".