6389759991 has 4 divisors (see below), whose sum is σ = 8519679992. Its totient is φ = 4259839992.

The previous prime is 6389759989. The next prime is 6389760001. The reversal of 6389759991 is 1999579836.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 6389759991 - 2¹ = 6389759989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6389759911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1064959996 + ... + 1064960001.

It is an arithmetic number, because the mean of its divisors is an integer number (2129919998).

Almost surely, 2^6389759991 is an apocalyptic number.

6389759991 is a deficient number, since it is larger than the sum of its proper divisors (2129920001).

6389759991 is a wasteful number, since it uses less digits than its factorization.

6389759991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2129920000.

The product of its digits is 33067440, while the sum is 66.

The square root of 6389759991 is about 79935.9743232044. The cubic root of 6389759991 is about 1855.6447983765.

The spelling of 6389759991 in words is "six billion, three hundred eighty-nine million, seven hundred fifty-nine thousand, nine hundred ninety-one".