2218181687064 has 48 divisors (see below), whose sum is σ = 6865800461520. Its totient is φ = 633766196160.

The previous prime is 2218181687041. The next prime is 2218181687069. The reversal of 2218181687064 is 4607861818122.

2218181687064 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 2218181687064.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2218181687069) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2200576567 + ... + 2200577574.

It is an arithmetic number, because the mean of its divisors is an integer number (143037509615).

Almost surely, 2^{2218181687064} is an apocalyptic number.

2218181687064 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2218181687064 is an abundant number, since it is smaller than the sum of its proper divisors (4647618774456).

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

2218181687064 is a wasteful number, since it uses less digits than its factorization.

2218181687064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4401154160 (or 4401154153 counting only the distinct ones).

The product of its (nonzero) digits is 2064384, while the sum is 54.

The spelling of 2218181687064 in words is "two trillion, two hundred eighteen billion, one hundred eighty-one million, six hundred eighty-seven thousand, sixty-four".