6191689728 has 104 divisors (see below), whose sum is σ = 18867870208. Its totient is φ = 1769029632.

The previous prime is 6191689667. The next prime is 6191689729. The reversal of 6191689728 is 8279861916.

It is not an unprimeable number, because it can be changed into a prime (6191689729) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 50025 + ... + 122007.

Almost surely, 2^6191689728 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 6191689728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9433935104).

6191689728 is an abundant number, since it is smaller than the sum of its proper divisors (12676180480).

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

6191689728 is an equidigital number, since it uses as much as digits as its factorization.

6191689728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72017 (or 71995 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 57.

The square root of 6191689728 is about 78687.2907654089. The cubic root of 6191689728 is about 1836.2693915065.

The spelling of 6191689728 in words is "six billion, one hundred ninety-one million, six hundred eighty-nine thousand, seven hundred twenty-eight".