318768385556 has 12 divisors (see below), whose sum is σ = 559278725460. Its totient is φ = 158974464000.

The previous prime is 318768385553. The next prime is 318768385603. The reversal of 318768385556 is 655583867813.

It can be written as a sum of positive squares in 2 ways, for example, as 63521137156 + 255247248400 = 252034^2 + 505220^2 .

It is a super-2 number, since 2×318768385556² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 318768385492 and 318768385501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (318768385553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102430445 + ... + 102433556.

It is an arithmetic number, because the mean of its divisors is an integer number (46606560455).

Almost surely, 2^318768385556 is an apocalyptic number.

It is an amenable number.

318768385556 is a deficient number, since it is larger than the sum of its proper divisors (240510339904).

318768385556 is a wasteful number, since it uses less digits than its factorization.

318768385556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204864394 (or 204864392 counting only the distinct ones).

The product of its digits is 145152000, while the sum is 65.

The spelling of 318768385556 in words is "three hundred eighteen billion, seven hundred sixty-eight million, three hundred eighty-five thousand, five hundred fifty-six".