318888663473 has 4 divisors (see below), whose sum is σ = 335672277360. Its totient is φ = 302105049588.

The previous prime is 318888663463. The next prime is 318888663491. The reversal of 318888663473 is 374366888813.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-318888663473 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (318888663463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8391806915 + ... + 8391806952.

It is an arithmetic number, because the mean of its divisors is an integer number (83918069340).

Almost surely, 2^318888663473 is an apocalyptic number.

It is an amenable number.

318888663473 is a deficient number, since it is larger than the sum of its proper divisors (16783613887).

318888663473 is a wasteful number, since it uses less digits than its factorization.

318888663473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16783613886.

The product of its digits is 111476736, while the sum is 65.

The spelling of 318888663473 in words is "three hundred eighteen billion, eight hundred eighty-eight million, six hundred sixty-three thousand, four hundred seventy-three".