8478545857 has 2 divisors, whose sum is σ = 8478545858. Its totient is φ = 8478545856.

The previous prime is 8478545851. The next prime is 8478545947. The reversal of 8478545857 is 7585458748.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8354691216 + 123854641 = 91404^2 + 11129^2 .

It is a cyclic number.

It is not a de Polignac number, because 8478545857 - 2²⁷ = 8344328129 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8478545795 and 8478545804.

It is not a weakly prime, because it can be changed into another prime (8478545851) 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 as a sum of consecutive naturals, namely, 4239272928 + 4239272929.

It is an arithmetic number, because the mean of its divisors is an integer number (4239272929).

Almost surely, 2^8478545857 is an apocalyptic number.

It is an amenable number.

8478545857 is a deficient number, since it is larger than the sum of its proper divisors (1).

8478545857 is an equidigital number, since it uses as much as digits as its factorization.

8478545857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 50176000, while the sum is 61.

The square root of 8478545857 is about 92079.0196353111. The cubic root of 8478545857 is about 2039.1090766365.

The spelling of 8478545857 in words is "eight billion, four hundred seventy-eight million, five hundred forty-five thousand, eight hundred fifty-seven".