218553351872 has 28 divisors (see below), whose sum is σ = 433721073120. Its totient is φ = 109269302016.

The previous prime is 218553351803. The next prime is 218553351889. The reversal of 218553351872 is 278153355812.

It is a happy number.

It is a super-2 number, since 2×218553351872² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 218553351872.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 911558 + ... + 1126074.

Almost surely, 2^218553351872 is an apocalyptic number.

It is an amenable number.

218553351872 is a deficient number, since it is larger than the sum of its proper divisors (215167721248).

218553351872 is a wasteful number, since it uses less digits than its factorization.

218553351872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230448 (or 230438 counting only the distinct ones).

The product of its digits is 2016000, while the sum is 50.

The spelling of 218553351872 in words is "two hundred eighteen billion, five hundred fifty-three million, three hundred fifty-one thousand, eight hundred seventy-two".