285643560949 has 2 divisors, whose sum is σ = 285643560950. Its totient is φ = 285643560948.

The previous prime is 285643560929. The next prime is 285643561031. The reversal of 285643560949 is 949065346582.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 196590258225 + 89053302724 = 443385^2 + 298418^2 .

It is a cyclic number.

It is not a de Polignac number, because 285643560949 - 2¹¹ = 285643558901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (285643560929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142821780474 + 142821780475.

It is an arithmetic number, because the mean of its divisors is an integer number (142821780475).

Almost surely, 2^285643560949 is an apocalyptic number.

It is an amenable number.

285643560949 is a deficient number, since it is larger than the sum of its proper divisors (1).

285643560949 is an equidigital number, since it uses as much as digits as its factorization.

285643560949 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 55987200, while the sum is 61.

The spelling of 285643560949 in words is "two hundred eighty-five billion, six hundred forty-three million, five hundred sixty thousand, nine hundred forty-nine".