218868153246990 has 48 divisors (see below), whose sum is σ = 612830829094848. Its totient is φ = 53875237722048.

The previous prime is 218868153246983. The next prime is 218868153247049. The reversal of 218868153246990 is 99642351868812.

218868153246990 is a `hidden beast` number, since 2 + 1 + 8 + 8 + 6 + 8 + 153 + 2 + 469 + 9 + 0 = 666.

218868153246990 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 an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 93533397654 + ... + 93533399993.

It is an arithmetic number, because the mean of its divisors is an integer number (12767308939476).

Almost surely, 2^{218868153246990} is an apocalyptic number.

218868153246990 is an abundant number, since it is smaller than the sum of its proper divisors (393962675847858).

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

218868153246990 is a wasteful number, since it uses less digits than its factorization.

218868153246990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187066797673 (or 187066797670 counting only the distinct ones).

The product of its (nonzero) digits is 358318080, while the sum is 72.

The spelling of 218868153246990 in words is "two hundred eighteen trillion, eight hundred sixty-eight billion, one hundred fifty-three million, two hundred forty-six thousand, nine hundred ninety".