8815668564 has 96 divisors (see below), whose sum is σ = 22318912000. Its totient is φ = 2699174016.

The previous prime is 8815668541. The next prime is 8815668571. The reversal of 8815668564 is 4658665188.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1359522 + ... + 1365990.

Almost surely, 2^8815668564 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 8815668564, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11159456000).

8815668564 is an abundant number, since it is smaller than the sum of its proper divisors (13503243436).

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

8815668564 is a wasteful number, since it uses less digits than its factorization.

8815668564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6677 (or 6675 counting only the distinct ones).

The product of its digits is 11059200, while the sum is 57.

The square root of 8815668564 is about 93891.7917818166. The cubic root of 8815668564 is about 2065.7848337130.

The spelling of 8815668564 in words is "eight billion, eight hundred fifteen million, six hundred sixty-eight thousand, five hundred sixty-four".