321366218616 has 96 divisors (see below), whose sum is σ = 882165407760. Its totient is φ = 105673790976.

The previous prime is 321366218567. The next prime is 321366218623. The reversal of 321366218616 is 616812663123.

321366218616 is a `hidden beast` number, since 3 + 2 + 1 + 3 + 6 + 6 + 21 + 8 + 616 = 666.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4006036 + ... + 4085468.

Almost surely, 2^321366218616 is an apocalyptic number.

321366218616 is a gapful number since it is divisible by the number (36) 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 321366218616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (441082703880).

321366218616 is an abundant number, since it is smaller than the sum of its proper divisors (560799189144).

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

321366218616 is a wasteful number, since it uses less digits than its factorization.

321366218616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80205 (or 80198 counting only the distinct ones).

The product of its digits is 373248, while the sum is 45.

The spelling of 321366218616 in words is "three hundred twenty-one billion, three hundred sixty-six million, two hundred eighteen thousand, six hundred sixteen".