318877158818 has 4 divisors (see below), whose sum is σ = 478315738230. Its totient is φ = 159438579408.

The previous prime is 318877158779. The next prime is 318877158863. The reversal of 318877158818 is 818851778813.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 818851778813 = 716809 ⋅1142357.

It can be written as a sum of positive squares in only one way, i.e., 292266740689 + 26610418129 = 540617^2 + 163127^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79719289703 + ... + 79719289706.

Almost surely, 2^318877158818 is an apocalyptic number.

318877158818 is a deficient number, since it is larger than the sum of its proper divisors (159438579412).

318877158818 is a wasteful number, since it uses less digits than its factorization.

318877158818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159438579411.

The product of its digits is 24084480, while the sum is 65.

The spelling of 318877158818 in words is "three hundred eighteen billion, eight hundred seventy-seven million, one hundred fifty-eight thousand, eight hundred eighteen".