218708291344 has 20 divisors (see below), whose sum is σ = 423764020224. Its totient is φ = 109349834528.

The previous prime is 218708291339. The next prime is 218708291359. The reversal of 218708291344 is 443192807812.

218708291344 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×218708291344² (a number of 23 digits) contains 22 as substring.

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, 170889 + ... + 683095.

Almost surely, 2^218708291344 is an apocalyptic number.

It is an amenable number.

218708291344 is a deficient number, since it is larger than the sum of its proper divisors (205055728880).

218708291344 is a wasteful number, since it uses less digits than its factorization.

218708291344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 538902 (or 538896 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 49.

The spelling of 218708291344 in words is "two hundred eighteen billion, seven hundred eight million, two hundred ninety-one thousand, three hundred forty-four".