218272306286644 has 12 divisors (see below), whose sum is σ = 382052611825668. Its totient is φ = 109114417193600.

The previous prime is 218272306286611. The next prime is 218272306286663. The reversal of 218272306286644 is 446682603272812.

It can be written as a sum of positive squares in 2 ways, for example, as 118017544233744 + 100254762052900 = 10863588^2 + 10012730^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5433964837 + ... + 5434005004.

It is an arithmetic number, because the mean of its divisors is an integer number (31837717652139).

Almost surely, 2^{218272306286644} is an apocalyptic number.

It is an amenable number.

218272306286644 is a deficient number, since it is larger than the sum of its proper divisors (163780305539024).

218272306286644 is a wasteful number, since it uses less digits than its factorization.

218272306286644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10867974866 (or 10867974864 counting only the distinct ones).

The product of its (nonzero) digits is 74317824, while the sum is 61.

The spelling of 218272306286644 in words is "two hundred eighteen trillion, two hundred seventy-two billion, three hundred six million, two hundred eighty-six thousand, six hundred forty-four".