218878878812 has 48 divisors (see below), whose sum is σ = 431811160704. Its totient is φ = 96214440000.

The previous prime is 218878878811. The next prime is 218878878833.

218878878812 is nontrivially palindromic in base 10.

218878878812 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218878878811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 381614 + ... + 763797.

It is an arithmetic number, because the mean of its divisors is an integer number (8996065848).

Almost surely, 2^218878878812 is an apocalyptic number.

218878878812 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

218878878812 is a deficient number, since it is larger than the sum of its proper divisors (212932281892).

218878878812 is a wasteful number, since it uses less digits than its factorization.

218878878812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1145570 (or 1145568 counting only the distinct ones).

The product of its digits is 51380224, while the sum is 68.

The spelling of 218878878812 in words is "two hundred eighteen billion, eight hundred seventy-eight million, eight hundred seventy-eight thousand, eight hundred twelve".