8655865680 has 640 divisors, whose sum is σ = 34854912000. Its totient is φ = 1775854080.

The previous prime is 8655865679. The next prime is 8655865711. The reversal of 8655865680 is 865685568.

It is a self number, because there is not a number n which added to its sum of digits gives 8655865680.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 109567881 + ... + 109567959.

It is an arithmetic number, because the mean of its divisors is an integer number (54460800).

Almost surely, 2^8655865680 is an apocalyptic number.

8655865680 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 8655865680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17427456000).

8655865680 is an abundant number, since it is smaller than the sum of its proper divisors (26199046320).

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

8655865680 is a wasteful number, since it uses less digits than its factorization.

8655865680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149 (or 107 counting only the distinct ones).

The product of its (nonzero) digits is 13824000, while the sum is 57.

The square root of 8655865680 is about 93036.9049356222. The cubic root of 8655865680 is about 2053.2263833184.

The spelling of 8655865680 in words is "eight billion, six hundred fifty-five million, eight hundred sixty-five thousand, six hundred eighty".