1216487589328 has 160 divisors (see below), whose sum is σ = 2676988661760. Its totient is φ = 530665344000.

The previous prime is 1216487589283. The next prime is 1216487589341. The reversal of 1216487589328 is 8239857846121.

It is a self number, because there is not a number n which added to its sum of digits gives 1216487589328.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 479119483 + ... + 479122021.

It is an arithmetic number, because the mean of its divisors is an integer number (16731179136).

Almost surely, 2^{1216487589328} 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 1216487589328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1338494330880).

1216487589328 is an abundant number, since it is smaller than the sum of its proper divisors (1460501072432).

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

1216487589328 is a wasteful number, since it uses less digits than its factorization.

1216487589328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3657 (or 3651 counting only the distinct ones).

The product of its digits is 46448640, while the sum is 64.

The spelling of 1216487589328 in words is "one trillion, two hundred sixteen billion, four hundred eighty-seven million, five hundred eighty-nine thousand, three hundred twenty-eight".