318243426913 has 8 divisors (see below), whose sum is σ = 320233137768. Its totient is φ = 316255442304.

The previous prime is 318243426901. The next prime is 318243426953. The reversal of 318243426913 is 319624342813.

It can be written as a sum of positive squares in 4 ways, for example, as 2929732129 + 315313694784 = 54127^2 + 561528^2 .

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 318243426913 - 2¹³ = 318243418721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (318243426953) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60706 + ... + 800107.

It is an arithmetic number, because the mean of its divisors is an integer number (40029142221).

Almost surely, 2^318243426913 is an apocalyptic number.

It is an amenable number.

318243426913 is a deficient number, since it is larger than the sum of its proper divisors (1989710855).

318243426913 is a wasteful number, since it uses less digits than its factorization.

318243426913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 863123.

The product of its digits is 746496, while the sum is 46.

The spelling of 318243426913 in words is "three hundred eighteen billion, two hundred forty-three million, four hundred twenty-six thousand, nine hundred thirteen".