218449944812 has 48 divisors (see below), whose sum is σ = 420625094400. Its totient is φ = 98445245760.

The previous prime is 218449944773. The next prime is 218449944863.

218449944812 is nontrivially palindromic in base 10.

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, 2692739 + ... + 2772677.

It is an arithmetic number, because the mean of its divisors is an integer number (8763022800).

Almost surely, 2^218449944812 is an apocalyptic number.

218449944812 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

218449944812 is a deficient number, since it is larger than the sum of its proper divisors (202175149588).

218449944812 is a wasteful number, since it uses less digits than its factorization.

218449944812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80486 (or 80484 counting only the distinct ones).

The product of its digits is 5308416, while the sum is 56.

The spelling of 218449944812 in words is "two hundred eighteen billion, four hundred forty-nine million, nine hundred forty-four thousand, eight hundred twelve".