318648364871 has 4 divisors (see below), whose sum is σ = 337392386352. Its totient is φ = 299904343392.

The previous prime is 318648364829. The next prime is 318648364873. The reversal of 318648364871 is 178463846813.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-318648364871 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 318648364871.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (318648364873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9372010715 + ... + 9372010748.

It is an arithmetic number, because the mean of its divisors is an integer number (84348096588).

Almost surely, 2^318648364871 is an apocalyptic number.

318648364871 is a deficient number, since it is larger than the sum of its proper divisors (18744021481).

318648364871 is a wasteful number, since it uses less digits than its factorization.

318648364871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18744021480.

The product of its digits is 18579456, while the sum is 59.

The spelling of 318648364871 in words is "three hundred eighteen billion, six hundred forty-eight million, three hundred sixty-four thousand, eight hundred seventy-one".