8448579217 has 12 divisors (see below), whose sum is σ = 9151819020. Its totient is φ = 7795826688.

The previous prime is 8448579143. The next prime is 8448579247. The reversal of 8448579217 is 7129758448.

It can be written as a sum of positive squares in 6 ways, for example, as 2144060416 + 6304518801 = 46304^2 + 79401^2 .

It is not a de Polignac number, because 8448579217 - 2¹¹ = 8448577169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8448579247) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 555093 + ... + 570109.

It is an arithmetic number, because the mean of its divisors is an integer number (762651585).

Almost surely, 2^8448579217 is an apocalyptic number.

It is an amenable number.

8448579217 is a deficient number, since it is larger than the sum of its proper divisors (703239803).

8448579217 is a wasteful number, since it uses less digits than its factorization.

8448579217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18372 (or 18359 counting only the distinct ones).

The product of its digits is 4515840, while the sum is 55.

The square root of 8448579217 is about 91916.1531886534. The cubic root of 8448579217 is about 2036.7038929869.

The spelling of 8448579217 in words is "eight billion, four hundred forty-eight million, five hundred seventy-nine thousand, two hundred seventeen".