285871340857 has 2 divisors, whose sum is σ = 285871340858. Its totient is φ = 285871340856.

The previous prime is 285871340849. The next prime is 285871340891. The reversal of 285871340857 is 758043178582.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 285400624441 + 470716416 = 534229^2 + 21696^2 .

It is a cyclic number.

It is not a de Polignac number, because 285871340857 - 2³ = 285871340849 is a prime.

It is not a weakly prime, because it can be changed into another prime (285871350857) 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 as a sum of consecutive naturals, namely, 142935670428 + 142935670429.

It is an arithmetic number, because the mean of its divisors is an integer number (142935670429).

Almost surely, 2^285871340857 is an apocalyptic number.

It is an amenable number.

285871340857 is a deficient number, since it is larger than the sum of its proper divisors (1).

285871340857 is an equidigital number, since it uses as much as digits as its factorization.

285871340857 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15052800, while the sum is 58.

The spelling of 285871340857 in words is "two hundred eighty-five billion, eight hundred seventy-one million, three hundred forty thousand, eight hundred fifty-seven".