285258505409 has 2 divisors, whose sum is σ = 285258505410. Its totient is φ = 285258505408.

The previous prime is 285258505391. The next prime is 285258505417. The reversal of 285258505409 is 904505852582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 256570614784 + 28687890625 = 506528^2 + 169375^2 .

It is a cyclic number.

It is not a de Polignac number, because 285258505409 - 2²⁴ = 285241728193 is a prime.

It is not a weakly prime, because it can be changed into another prime (285258505439) 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, 142629252704 + 142629252705.

It is an arithmetic number, because the mean of its divisors is an integer number (142629252705).

Almost surely, 2^285258505409 is an apocalyptic number.

It is an amenable number.

285258505409 is a deficient number, since it is larger than the sum of its proper divisors (1).

285258505409 is an equidigital number, since it uses as much as digits as its factorization.

285258505409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760000, while the sum is 53.

The spelling of 285258505409 in words is "two hundred eighty-five billion, two hundred fifty-eight million, five hundred five thousand, four hundred nine".