318858412885 has 16 divisors (see below), whose sum is σ = 385391133936. Its totient is φ = 253248772608.

The previous prime is 318858412883. The next prime is 318858412907. The reversal of 318858412885 is 588214858813.

It can be written as a sum of positive squares in 8 ways, for example, as 5296491729 + 313561921156 = 72777^2 + 559966^2 .

It is a cyclic number.

It is not a de Polignac number, because 318858412885 - 2¹ = 318858412883 is a prime.

It is a super-2 number, since 2×318858412885² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (318858412883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 766267 + ... + 1106743.

It is an arithmetic number, because the mean of its divisors is an integer number (24086945871).

Almost surely, 2^318858412885 is an apocalyptic number.

It is an amenable number.

318858412885 is a deficient number, since it is larger than the sum of its proper divisors (66532721051).

318858412885 is a wasteful number, since it uses less digits than its factorization.

318858412885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341832.

The product of its digits is 19660800, while the sum is 61.

The spelling of 318858412885 in words is "three hundred eighteen billion, eight hundred fifty-eight million, four hundred twelve thousand, eight hundred eighty-five".