16218064784000 has 128 divisors (see below), whose sum is σ = 40324701016080. Its totient is φ = 6486817689600.

The previous prime is 16218064783901. The next prime is 16218064784021. The reversal of 16218064784000 is 48746081261.

It can be written as a sum of positive squares in 8 ways, for example, as 412605814336 + 15805458969664 = 642344^2 + 3975608^2 .

It is a tau number, because it is divible by the number of its divisors (128).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 480191114 + ... + 480224886.

Almost surely, 2^{16218064784000} is an apocalyptic number.

16218064784000 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 16218064784000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20162350508040).

16218064784000 is an abundant number, since it is smaller than the sum of its proper divisors (24106636232080).

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

16218064784000 is an equidigital number, since it uses as much as digits as its factorization.

16218064784000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63815 (or 63793 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 47.

The spelling of 16218064784000 in words is "sixteen trillion, two hundred eighteen billion, sixty-four million, seven hundred eighty-four thousand".