8228643509 has 8 divisors (see below), whose sum is σ = 8271036312. Its totient is φ = 8186319360.

The previous prime is 8228643497. The next prime is 8228643517. The reversal of 8228643509 is 9053468228.

It can be written as a sum of positive squares in 4 ways, for example, as 5914071409 + 2314572100 = 76903^2 + 48110^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8228643509 - 2²⁴ = 8211866293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8228643589) 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 in 7 ways as a sum of consecutive naturals, for example, 232427 + ... + 265479.

It is an arithmetic number, because the mean of its divisors is an integer number (1033879539).

Almost surely, 2^8228643509 is an apocalyptic number.

It is an amenable number.

8228643509 is a deficient number, since it is larger than the sum of its proper divisors (42392803).

8228643509 is a wasteful number, since it uses less digits than its factorization.

8228643509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34327.

The product of its (nonzero) digits is 829440, while the sum is 47.

The square root of 8228643509 is about 90711.8708273620. The cubic root of 8228643509 is about 2018.8749338165.

The spelling of 8228643509 in words is "eight billion, two hundred twenty-eight million, six hundred forty-three thousand, five hundred nine".