319678367857 has 2 divisors, whose sum is σ = 319678367858. Its totient is φ = 319678367856.

The previous prime is 319678367849. The next prime is 319678367861. The reversal of 319678367857 is 758763876913.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 231360038001 + 88318329856 = 480999^2 + 297184^2 .

It is a cyclic number.

It is not a de Polignac number, because 319678367857 - 2³ = 319678367849 is a prime.

It is a super-3 number, since 3×319678367857³ (a number of 35 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (319678367887) 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 as a sum of consecutive naturals, namely, 159839183928 + 159839183929.

It is an arithmetic number, because the mean of its divisors is an integer number (159839183929).

Almost surely, 2^319678367857 is an apocalyptic number.

It is an amenable number.

319678367857 is a deficient number, since it is larger than the sum of its proper divisors (1).

319678367857 is an equidigital number, since it uses as much as digits as its factorization.

319678367857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 320060160, while the sum is 70.

The spelling of 319678367857 in words is "three hundred nineteen billion, six hundred seventy-eight million, three hundred sixty-seven thousand, eight hundred fifty-seven".