5991321868 has 24 divisors (see below), whose sum is σ = 12027204000. Its totient is φ = 2558160768.

The previous prime is 5991321863. The next prime is 5991321907. The reversal of 5991321868 is 8681231995.

It is not an unprimeable number, because it can be changed into a prime (5991321863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 390193 + ... + 405256.

It is an arithmetic number, because the mean of its divisors is an integer number (501133500).

Almost surely, 2^5991321868 is an apocalyptic number.

It is an amenable number.

5991321868 is an abundant number, since it is smaller than the sum of its proper divisors (6035882132).

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

5991321868 is a wasteful number, since it uses less digits than its factorization.

5991321868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 795729 (or 795727 counting only the distinct ones).

The product of its digits is 933120, while the sum is 52.

The square root of 5991321868 is about 77403.6295531418. The cubic root of 5991321868 is about 1816.2441027706.

The spelling of 5991321868 in words is "five billion, nine hundred ninety-one million, three hundred twenty-one thousand, eight hundred sixty-eight".