218906326208 has 56 divisors (see below), whose sum is σ = 445459195440. Its totient is φ = 106670305280.

The previous prime is 218906326207. The next prime is 218906326217. The reversal of 218906326208 is 802623609812.

It is not an unprimeable number, because it can be changed into a prime (218906326207) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2456903 + ... + 2544441.

It is an arithmetic number, because the mean of its divisors is an integer number (7954628490).

Almost surely, 2^218906326208 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 218906326208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (222729597720).

218906326208 is an abundant number, since it is smaller than the sum of its proper divisors (226552869232).

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

218906326208 is an equidigital number, since it uses as much as digits as its factorization.

218906326208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88545 (or 88535 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 47.

The spelling of 218906326208 in words is "two hundred eighteen billion, nine hundred six million, three hundred twenty-six thousand, two hundred eight".