218326780332386 has 96 divisors (see below), whose sum is σ = 394707019860720. Its totient is φ = 90084787752960.

The previous prime is 218326780332377. The next prime is 218326780332431. The reversal of 218326780332386 is 683233087623812.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 120014895227161 + 98311885105225 = 10955131^2 + 9915235^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 110813216 + ... + 112766228.

Almost surely, 2^{218326780332386} is an apocalyptic number.

218326780332386 is a deficient number, since it is larger than the sum of its proper divisors (176380239528334).

218326780332386 is a wasteful number, since it uses less digits than its factorization.

218326780332386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1954020 (or 1954009 counting only the distinct ones).

The product of its (nonzero) digits is 83607552, while the sum is 62.

The spelling of 218326780332386 in words is "two hundred eighteen trillion, three hundred twenty-six billion, seven hundred eighty million, three hundred thirty-two thousand, three hundred eighty-six".