8318555967818 has 4 divisors (see below), whose sum is σ = 12477833951730. Its totient is φ = 4159277983908.

The previous prime is 8318555967803. The next prime is 8318555967833. The reversal of 8318555967818 is 8187695558138.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (8318555967803) and next prime (8318555967833).

It can be written as a sum of positive squares in only one way, i.e., 6205245407089 + 2113310560729 = 2491033^2 + 1453723^2 .

It is a super-2 number, since 2×8318555967818² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2079638991953 + ... + 2079638991956.

Almost surely, 2^{8318555967818} is an apocalyptic number.

8318555967818 is a deficient number, since it is larger than the sum of its proper divisors (4159277983912).

8318555967818 is a wasteful number, since it uses less digits than its factorization.

8318555967818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4159277983911.

The product of its digits is 580608000, while the sum is 74.

The spelling of 8318555967818 in words is "eight trillion, three hundred eighteen billion, five hundred fifty-five million, nine hundred sixty-seven thousand, eight hundred eighteen".