8391605916 has 24 divisors (see below), whose sum is σ = 19589363584. Its totient is φ = 2795923440.

The previous prime is 8391605869. The next prime is 8391605917. The reversal of 8391605916 is 6195061938.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8391605917) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 132280 + ... + 185151.

Almost surely, 2^8391605916 is an apocalyptic number.

It is an amenable number.

8391605916 is an abundant number, since it is smaller than the sum of its proper divisors (11197757668).

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

8391605916 is a wasteful number, since it uses less digits than its factorization.

8391605916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319641 (or 319639 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 48.

The square root of 8391605916 is about 91605.7089705658. The cubic root of 8391605916 is about 2032.1153676077.

The spelling of 8391605916 in words is "eight billion, three hundred ninety-one million, six hundred five thousand, nine hundred sixteen".