8556250009 has 2 divisors, whose sum is σ = 8556250010. Its totient is φ = 8556250008.

The previous prime is 8556249997. The next prime is 8556250013. The reversal of 8556250009 is 9000526558.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8556250000 + 9 = 92500^2 + 3^2 .

It is a cyclic number.

It is not a de Polignac number, because 8556250009 - 2¹⁹ = 8555725721 is a prime.

It is not a weakly prime, because it can be changed into another prime (8556250019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4278125004 + 4278125005.

It is an arithmetic number, because the mean of its divisors is an integer number (4278125005).

Almost surely, 2^8556250009 is an apocalyptic number.

It is an amenable number.

8556250009 is a deficient number, since it is larger than the sum of its proper divisors (1).

8556250009 is an equidigital number, since it uses as much as digits as its factorization.

8556250009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108000, while the sum is 40.

The square root of 8556250009 is about 92500.0000486486. Note that the first 4 decimals coincide. The cubic root of 8556250009 is about 2045.3194830074.

The spelling of 8556250009 in words is "eight billion, five hundred fifty-six million, two hundred fifty thousand, nine".