8657817648 has 80 divisors (see below), whose sum is σ = 23019776640. Its totient is φ = 2802767872.

The previous prime is 8657817629. The next prime is 8657817677. The reversal of 8657817648 is 8467187568.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 8657817591 and 8657817600.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 216640 + ... + 253472.

It is an arithmetic number, because the mean of its divisors is an integer number (287747208).

Almost surely, 2^8657817648 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8657817648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11509888320).

8657817648 is an abundant number, since it is smaller than the sum of its proper divisors (14361958992).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8657817648 is a wasteful number, since it uses less digits than its factorization.

8657817648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36986 (or 36980 counting only the distinct ones).

The product of its digits is 18063360, while the sum is 60.

The square root of 8657817648 is about 93047.3946330578. The cubic root of 8657817648 is about 2053.3807114590.

The spelling of 8657817648 in words is "eight billion, six hundred fifty-seven million, eight hundred seventeen thousand, six hundred forty-eight".