1318043684648 has 16 divisors (see below), whose sum is σ = 2471348980980. Its totient is φ = 659017289728.

The previous prime is 1318043684593. The next prime is 1318043684669. The reversal of 1318043684648 is 8464863408131.

It can be written as a sum of positive squares in 2 ways, for example, as 1264459768324 + 53583916324 = 1124482^2 + 231482^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1318043684593 and 1318043684602.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 877736 + ... + 1845672.

Almost surely, 2^{1318043684648} is an apocalyptic number.

It is an amenable number.

1318043684648 is a deficient number, since it is larger than the sum of its proper divisors (1153305296332).

1318043684648 is a wasteful number, since it uses less digits than its factorization.

1318043684648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1138156 (or 1138152 counting only the distinct ones).

The product of its (nonzero) digits is 10616832, while the sum is 56.

The spelling of 1318043684648 in words is "one trillion, three hundred eighteen billion, forty-three million, six hundred eighty-four thousand, six hundred forty-eight".