318173188673 has 2 divisors, whose sum is σ = 318173188674. Its totient is φ = 318173188672.

The previous prime is 318173188661. The next prime is 318173188679. The reversal of 318173188673 is 376881371813.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 279901309249 + 38271879424 = 529057^2 + 195632^2 .

It is an emirp because it is prime and its reverse (376881371813) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-318173188673 is a prime.

It is not a weakly prime, because it can be changed into another prime (318173188679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159086594336 + 159086594337.

It is an arithmetic number, because the mean of its divisors is an integer number (159086594337).

Almost surely, 2^318173188673 is an apocalyptic number.

It is an amenable number.

318173188673 is a deficient number, since it is larger than the sum of its proper divisors (1).

318173188673 is an equidigital number, since it uses as much as digits as its factorization.

318173188673 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4064256, while the sum is 56.

The spelling of 318173188673 in words is "three hundred eighteen billion, one hundred seventy-three million, one hundred eighty-eight thousand, six hundred seventy-three".