8321320464 has 20 divisors (see below), whose sum is σ = 21496744656. Its totient is φ = 2773773472.

The previous prime is 8321320439. The next prime is 8321320481. The reversal of 8321320464 is 4640231238.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86680374 + ... + 86680469.

Almost surely, 2^8321320464 is an apocalyptic number.

It is an amenable number.

8321320464 is an abundant number, since it is smaller than the sum of its proper divisors (13175424192).

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

8321320464 is a wasteful number, since it uses less digits than its factorization.

8321320464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173360854 (or 173360848 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 33.

The square root of 8321320464 is about 91221.2719928855. The cubic root of 8321320464 is about 2026.4260007292.

The spelling of 8321320464 in words is "eight billion, three hundred twenty-one million, three hundred twenty thousand, four hundred sixty-four".