8321584656 has 80 divisors (see below), whose sum is σ = 26801998848. Its totient is φ = 2161449600.

The previous prime is 8321584631. The next prime is 8321584693. The reversal of 8321584656 is 6564851238.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1122060 + ... + 1129451.

Almost surely, 2^8321584656 is an apocalyptic number.

It is an amenable number.

8321584656 is an abundant number, since it is smaller than the sum of its proper divisors (18480414192).

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

8321584656 is a wasteful number, since it uses less digits than its factorization.

8321584656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2251540 (or 2251534 counting only the distinct ones).

The product of its digits is 1382400, while the sum is 48.

The square root of 8321584656 is about 91222.7200646856. The cubic root of 8321584656 is about 2026.4474460385.

The spelling of 8321584656 in words is "eight billion, three hundred twenty-one million, five hundred eighty-four thousand, six hundred fifty-six".