318681701361 has 27 divisors (see below), whose sum is σ = 489032519521. Its totient is φ = 199939081344.

The previous prime is 318681701339. The next prime is 318681701363. The reversal of 318681701361 is 163107186813.

The square root of 318681701361 is 564519.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 10163664225 + 308518037136 = 100815^2 + 555444^2 .

It is not a de Polignac number, because 318681701361 - 2⁵ = 318681701329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (318681701363) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 28784935 + ... + 28796003.

Almost surely, 2^318681701361 is an apocalyptic number.

318681701361 is the 564519-th square number.

318681701361 is the 282260-th centered octagonal number.

It is an amenable number.

318681701361 is a deficient number, since it is larger than the sum of its proper divisors (170350818160).

318681701361 is an frugal number, since it uses more digits than its factorization.

318681701361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22178 (or 11089 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The spelling of 318681701361 in words is "three hundred eighteen billion, six hundred eighty-one million, seven hundred one thousand, three hundred sixty-one".