218442521788 has 12 divisors (see below), whose sum is σ = 382452977592. Its totient is φ = 109170242480.

The previous prime is 218442521783. The next prime is 218442521807. The reversal of 218442521788 is 887125244812.

218442521788 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 (218442521783) 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 3 ways as a sum of consecutive naturals, for example, 12744970 + ... + 12762097.

It is an arithmetic number, because the mean of its divisors is an integer number (31871081466).

Almost surely, 2^218442521788 is an apocalyptic number.

It is an amenable number.

218442521788 is a deficient number, since it is larger than the sum of its proper divisors (164010455804).

218442521788 is a wasteful number, since it uses less digits than its factorization.

218442521788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25509212 (or 25509210 counting only the distinct ones).

The product of its digits is 2293760, while the sum is 52.

The spelling of 218442521788 in words is "two hundred eighteen billion, four hundred forty-two million, five hundred twenty-one thousand, seven hundred eighty-eight".