6391082720 has 96 divisors (see below), whose sum is σ = 16509388896. Its totient is φ = 2318694400.

The previous prime is 6391082683. The next prime is 6391082723. The reversal of 6391082720 is 272801936.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6391082723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 807422 + ... + 815298.

It is an arithmetic number, because the mean of its divisors is an integer number (171972801).

Almost surely, 2^6391082720 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 6391082720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8254694448).

6391082720 is an abundant number, since it is smaller than the sum of its proper divisors (10118306176).

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

6391082720 is a wasteful number, since it uses less digits than its factorization.

6391082720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8364 (or 8356 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 6391082720 is about 79944.2475729180. The cubic root of 6391082720 is about 1855.7728337457.

The spelling of 6391082720 in words is "six billion, three hundred ninety-one million, eighty-two thousand, seven hundred twenty".