285025568209 has 2 divisors, whose sum is σ = 285025568210. Its totient is φ = 285025568208.

The previous prime is 285025568189. The next prime is 285025568213. The reversal of 285025568209 is 902865520582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 194079897025 + 90945671184 = 440545^2 + 301572^2 .

It is a cyclic number.

It is not a de Polignac number, because 285025568209 - 2²⁷ = 284891350481 is a prime.

It is a super-2 number, since 2×285025568209² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (285025568609) 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, 142512784104 + 142512784105.

It is an arithmetic number, because the mean of its divisors is an integer number (142512784105).

Almost surely, 2^285025568209 is an apocalyptic number.

It is an amenable number.

285025568209 is a deficient number, since it is larger than the sum of its proper divisors (1).

285025568209 is an equidigital number, since it uses as much as digits as its factorization.

285025568209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456000, while the sum is 52.

The spelling of 285025568209 in words is "two hundred eighty-five billion, twenty-five million, five hundred sixty-eight thousand, two hundred nine".