1216534363152 has 20 divisors (see below), whose sum is σ = 3142713771600. Its totient is φ = 405511454368.

The previous prime is 1216534363133. The next prime is 1216534363183. The reversal of 1216534363152 is 2513634356121.

It is a happy 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 3 ways as a sum of consecutive naturals, for example, 12672232902 + ... + 12672232997.

It is an arithmetic number, because the mean of its divisors is an integer number (157135688580).

Almost surely, 2^{1216534363152} is an apocalyptic number.

1216534363152 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1216534363152 is an abundant number, since it is smaller than the sum of its proper divisors (1926179408448).

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

1216534363152 is a wasteful number, since it uses less digits than its factorization.

1216534363152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25344465910 (or 25344465904 counting only the distinct ones).

The product of its digits is 388800, while the sum is 42.

The spelling of 1216534363152 in words is "one trillion, two hundred sixteen billion, five hundred thirty-four million, three hundred sixty-three thousand, one hundred fifty-two".