318648378413 has 8 divisors (see below), whose sum is σ = 322631795640. Its totient is φ = 314679214080.

The previous prime is 318648378379. The next prime is 318648378457. The reversal of 318648378413 is 314873846813.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 13605356164 + 305043022249 = 116642^2 + 552307^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 318648378413 - 2²⁰ = 318647329837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (318648378473) 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 7 ways as a sum of consecutive naturals, for example, 3518228 + ... + 3607661.

It is an arithmetic number, because the mean of its divisors is an integer number (40328974455).

Almost surely, 2^318648378413 is an apocalyptic number.

It is an amenable number.

318648378413 is a deficient number, since it is larger than the sum of its proper divisors (3983417227).

318648378413 is an equidigital number, since it uses as much as digits as its factorization.

318648378413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7126447.

The product of its digits is 9289728, while the sum is 56.

The spelling of 318648378413 in words is "three hundred eighteen billion, six hundred forty-eight million, three hundred seventy-eight thousand, four hundred thirteen".