285784806497 has 2 divisors, whose sum is σ = 285784806498. Its totient is φ = 285784806496.

The previous prime is 285784806481. The next prime is 285784806547. The reversal of 285784806497 is 794608487582.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 282743173696 + 3041632801 = 531736^2 + 55151^2 .

It is a cyclic number.

It is not a de Polignac number, because 285784806497 - 2⁴ = 285784806481 is a prime.

It is a super-2 number, since 2×285784806497² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (285784806997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142892403248 + 142892403249.

It is an arithmetic number, because the mean of its divisors is an integer number (142892403249).

Almost surely, 2^285784806497 is an apocalyptic number.

It is an amenable number.

285784806497 is a deficient number, since it is larger than the sum of its proper divisors (1).

285784806497 is an equidigital number, since it uses as much as digits as its factorization.

285784806497 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216760320, while the sum is 68.

The spelling of 285784806497 in words is "two hundred eighty-five billion, seven hundred eighty-four million, eight hundred six thousand, four hundred ninety-seven".