8457816647 has 12 divisors (see below), whose sum is σ = 9840936456. Its totient is φ = 7247898000.

The previous prime is 8457816637. The next prime is 8457816649. The reversal of 8457816647 is 7466187548.

It is a happy number.

It is not a de Polignac number, because 8457816647 - 2²⁰ = 8456768071 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8457816592 and 8457816601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8457816649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 227897 + ... + 262397.

It is an arithmetic number, because the mean of its divisors is an integer number (820078038).

Almost surely, 2^8457816647 is an apocalyptic number.

8457816647 is a deficient number, since it is larger than the sum of its proper divisors (1383119809).

8457816647 is a wasteful number, since it uses less digits than its factorization.

8457816647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39518 (or 39511 counting only the distinct ones).

The product of its digits is 9031680, while the sum is 56.

The square root of 8457816647 is about 91966.3886808654. The cubic root of 8457816647 is about 2037.4459134877.

The spelling of 8457816647 in words is "eight billion, four hundred fifty-seven million, eight hundred sixteen thousand, six hundred forty-seven".