1216019784960 has 216 divisors, whose sum is σ = 4226177539584. Its totient is φ = 322817126400.

The previous prime is 1216019784937. The next prime is 1216019784961. The reversal of 1216019784960 is 694879106121.

1216019784960 is a `hidden beast` number, since 1 + 2 + 1 + 60 + 1 + 97 + 8 + 496 + 0 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 1216019784897 and 1216019784906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216019784961) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2332285 + ... + 2805635.

Almost surely, 2^{1216019784960} is an apocalyptic number.

1216019784960 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1216019784960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2113088769792).

1216019784960 is an abundant number, since it is smaller than the sum of its proper divisors (3010157754624).

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

1216019784960 is a wasteful number, since it uses less digits than its factorization.

1216019784960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473601 (or 473584 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 54.

The spelling of 1216019784960 in words is "one trillion, two hundred sixteen billion, nineteen million, seven hundred eighty-four thousand, nine hundred sixty".