218626658068 has 72 divisors (see below), whose sum is σ = 480002477472. Its totient is φ = 86362347456.

The previous prime is 218626658059. The next prime is 218626658069. The reversal of 218626658068 is 860856626812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218626658069) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1677471 + ... + 1803097.

It is an arithmetic number, because the mean of its divisors is an integer number (6666701076).

Almost surely, 2^218626658068 is an apocalyptic number.

218626658068 is a gapful number since it is divisible by the number (28) 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 218626658068, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (240001238736).

218626658068 is an abundant number, since it is smaller than the sum of its proper divisors (261375819404).

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

218626658068 is a wasteful number, since it uses less digits than its factorization.

218626658068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126341 (or 126332 counting only the distinct ones).

The product of its (nonzero) digits is 13271040, while the sum is 58.

The spelling of 218626658068 in words is "two hundred eighteen billion, six hundred twenty-six million, six hundred fifty-eight thousand, sixty-eight".