218002233816 has 128 divisors (see below), whose sum is σ = 634296960000. Its totient is φ = 69243254784.

The previous prime is 218002233781. The next prime is 218002233863. The reversal of 218002233816 is 618332200812.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1223160 + ... + 1390008.

It is an arithmetic number, because the mean of its divisors is an integer number (4955445000).

Almost surely, 2^218002233816 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 218002233816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (317148480000).

218002233816 is an abundant number, since it is smaller than the sum of its proper divisors (416294726184).

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

218002233816 is a wasteful number, since it uses less digits than its factorization.

218002233816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167150 (or 167140 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The spelling of 218002233816 in words is "two hundred eighteen billion, two million, two hundred thirty-three thousand, eight hundred sixteen".