8656440000 has 560 divisors, whose sum is σ = 31993758720. Its totient is φ = 2050560000.

The previous prime is 8656439989. The next prime is 8656440047. The reversal of 8656440000 is 446568.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 48359911 + ... + 48360089.

It is an arithmetic number, because the mean of its divisors is an integer number (57131712).

Almost surely, 2^8656440000 is an apocalyptic number.

8656440000 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8656440000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15996879360).

8656440000 is an abundant number, since it is smaller than the sum of its proper divisors (23337318720).

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

8656440000 is a wasteful number, since it uses less digits than its factorization.

8656440000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258 (or 233 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 8656440000 is about 93039.9914015473. The cubic root of 8656440000 is about 2053.2717930995.

Adding to 8656440000 its reverse (446568), we get a palindrome (8656886568).

The spelling of 8656440000 in words is "eight billion, six hundred fifty-six million, four hundred forty thousand".