318985516838 has 4 divisors (see below), whose sum is σ = 478478275260. Its totient is φ = 159492758418.

The previous prime is 318985516831. The next prime is 318985516897. The reversal of 318985516838 is 838615589813.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 838615589813 = 113 ⋅7421376901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (318985516831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79746379208 + ... + 79746379211.

It is an arithmetic number, because the mean of its divisors is an integer number (119619568815).

Almost surely, 2^318985516838 is an apocalyptic number.

318985516838 is a deficient number, since it is larger than the sum of its proper divisors (159492758422).

318985516838 is a wasteful number, since it uses less digits than its factorization.

318985516838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159492758421.

The product of its digits is 49766400, while the sum is 65.

The spelling of 318985516838 in words is "three hundred eighteen billion, nine hundred eighty-five million, five hundred sixteen thousand, eight hundred thirty-eight".