218817117244446 has 32 divisors (see below), whose sum is σ = 500177489929728. Its totient is φ = 62516166469920.

The previous prime is 218817117244433. The next prime is 218817117244541. The reversal of 218817117244446 is 644442711718812.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 218817117244446.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 124529050 + ... + 126273981.

It is an arithmetic number, because the mean of its divisors is an integer number (15630546560304).

Almost surely, 2^{218817117244446} is an apocalyptic number.

218817117244446 is an abundant number, since it is smaller than the sum of its proper divisors (281360372685282).

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

218817117244446 is a wasteful number, since it uses less digits than its factorization.

218817117244446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250823816.

The product of its digits is 19267584, while the sum is 60.

The spelling of 218817117244446 in words is "two hundred eighteen trillion, eight hundred seventeen billion, one hundred seventeen million, two hundred forty-four thousand, four hundred forty-six".