285689153249 has 4 divisors (see below), whose sum is σ = 285698626836. Its totient is φ = 285679679664.

The previous prime is 285689153173. The next prime is 285689153257. The reversal of 285689153249 is 942351986582.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 282591117649 + 3098035600 = 531593^2 + 55660^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-285689153249 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 285689153191 and 285689153200.

It is not an unprimeable number, because it can be changed into a prime (285689153749) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4691414 + ... + 4751919.

It is an arithmetic number, because the mean of its divisors is an integer number (71424656709).

Almost surely, 2^285689153249 is an apocalyptic number.

It is an amenable number.

285689153249 is a deficient number, since it is larger than the sum of its proper divisors (9473587).

285689153249 is an equidigital number, since it uses as much as digits as its factorization.

285689153249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9473586.

The product of its digits is 37324800, while the sum is 62.

The spelling of 285689153249 in words is "two hundred eighty-five billion, six hundred eighty-nine million, one hundred fifty-three thousand, two hundred forty-nine".