8557482809 has 2 divisors, whose sum is σ = 8557482810. Its totient is φ = 8557482808.

The previous prime is 8557482799. The next prime is 8557482811. The reversal of 8557482809 is 9082847558.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8198759209 + 358723600 = 90547^2 + 18940^2 .

It is a cyclic number.

It is not a de Polignac number, because 8557482809 - 2¹⁶ = 8557417273 is a prime.

Together with 8557482811, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (8557482839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4278741404 + 4278741405.

It is an arithmetic number, because the mean of its divisors is an integer number (4278741405).

Almost surely, 2^8557482809 is an apocalyptic number.

It is an amenable number.

8557482809 is a deficient number, since it is larger than the sum of its proper divisors (1).

8557482809 is an equidigital number, since it uses as much as digits as its factorization.

8557482809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6451200, while the sum is 56.

The square root of 8557482809 is about 92506.6635924137. The cubic root of 8557482809 is about 2045.4177094020.

The spelling of 8557482809 in words is "eight billion, five hundred fifty-seven million, four hundred eighty-two thousand, eight hundred nine".