218645108208 has 120 divisors (see below), whose sum is σ = 621296472576. Its totient is φ = 71763753600.

The previous prime is 218645108191. The next prime is 218645108251. The reversal of 218645108208 is 802801546812.

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, 45256353 + ... + 45261183.

Almost surely, 2^218645108208 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 218645108208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (310648236288).

218645108208 is an abundant number, since it is smaller than the sum of its proper divisors (402651364368).

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

218645108208 is a wasteful number, since it uses less digits than its factorization.

218645108208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9603 (or 9594 counting only the distinct ones).

The product of its (nonzero) digits is 245760, while the sum is 45.

The spelling of 218645108208 in words is "two hundred eighteen billion, six hundred forty-five million, one hundred eight thousand, two hundred eight".