218388231468 has 72 divisors (see below), whose sum is σ = 602304655680. Its totient is φ = 66169179360.

The previous prime is 218388231437. The next prime is 218388231511. The reversal of 218388231468 is 864132883812.

218388231468 is a `hidden beast` number, since 2 + 1 + 83 + 88 + 23 + 1 + 468 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3205171 + ... + 3272597.

It is an arithmetic number, because the mean of its divisors is an integer number (8365342440).

Almost surely, 2^218388231468 is an apocalyptic number.

It is an amenable number.

218388231468 is an abundant number, since it is smaller than the sum of its proper divisors (383916424212).

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

218388231468 is a wasteful number, since it uses less digits than its factorization.

218388231468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75627 (or 75622 counting only the distinct ones).

The product of its digits is 3538944, while the sum is 54.

The spelling of 218388231468 in words is "two hundred eighteen billion, three hundred eighty-eight million, two hundred thirty-one thousand, four hundred sixty-eight".