818346545643818 has 8 divisors (see below), whose sum is σ = 1227662073656580. Its totient is φ = 409125854424960.

The previous prime is 818346545643791. The next prime is 818346545643863.

It is a happy number.

818346545643818 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 817353049035769 + 993496608049 = 28589387^2 + 996743^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23709176903 + ... + 23709211418.

Almost surely, 2^{818346545643818} is an apocalyptic number.

818346545643818 is a deficient number, since it is larger than the sum of its proper divisors (409315528012762).

818346545643818 is a wasteful number, since it uses less digits than its factorization.

818346545643818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47418396952.

The product of its digits is 2123366400, while the sum is 74.

The spelling of 818346545643818 in words is "eight hundred eighteen trillion, three hundred forty-six billion, five hundred forty-five million, six hundred forty-three thousand, eight hundred eighteen".