318986985079858 has 4 divisors (see below), whose sum is σ = 478480477619790. Its totient is φ = 159493492539928.

The previous prime is 318986985079817. The next prime is 318986985079859. The reversal of 318986985079858 is 858970589689813.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 174478288614529 + 144508696465329 = 13209023^2 + 12021177^2 .

It is not an unprimeable number, because it can be changed into a prime (318986985079859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79746746269963 + ... + 79746746269966.

Almost surely, 2^{318986985079858} is an apocalyptic number.

318986985079858 is a deficient number, since it is larger than the sum of its proper divisors (159493492539932).

318986985079858 is a wasteful number, since it uses less digits than its factorization.

318986985079858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159493492539931.

The product of its (nonzero) digits is 75246796800, while the sum is 94.

The spelling of 318986985079858 in words is "three hundred eighteen trillion, nine hundred eighty-six billion, nine hundred eighty-five million, seventy-nine thousand, eight hundred fifty-eight".