318656730656 has 192 divisors, whose sum is σ = 756465454080. Its totient is φ = 130437120000.

The previous prime is 318656730653. The next prime is 318656730659. The reversal of 318656730656 is 656037656813.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (318656730653) and next prime (318656730659).

It is a super-2 number, since 2×318656730656² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (318656730653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16500206 + ... + 16519506.

It is an arithmetic number, because the mean of its divisors is an integer number (3939924240).

Almost surely, 2^318656730656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 318656730656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (378232727040).

318656730656 is an abundant number, since it is smaller than the sum of its proper divisors (437808723424).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

318656730656 is a wasteful number, since it uses less digits than its factorization.

318656730656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19459 (or 19451 counting only the distinct ones).

The product of its (nonzero) digits is 16329600, while the sum is 56.

The spelling of 318656730656 in words is "three hundred eighteen billion, six hundred fifty-six million, seven hundred thirty thousand, six hundred fifty-six".