6430591689 has 16 divisors (see below), whose sum is σ = 9255427200. Its totient is φ = 3959263616.

The previous prime is 6430591639. The next prime is 6430591691. The reversal of 6430591689 is 9861950346.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6430591689 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (6430591619) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1604844 + ... + 1608845.

It is an arithmetic number, because the mean of its divisors is an integer number (578464200).

Almost surely, 2^6430591689 is an apocalyptic number.

6430591689 is a gapful number since it is divisible by the number (69) formed by its first and last digit.

It is an amenable number.

6430591689 is a deficient number, since it is larger than the sum of its proper divisors (2824835511).

6430591689 is a wasteful number, since it uses less digits than its factorization.

6430591689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3213744.

The product of its (nonzero) digits is 1399680, while the sum is 51.

The square root of 6430591689 is about 80190.9701213297. The cubic root of 6430591689 is about 1859.5890417661.

The spelling of 6430591689 in words is "six billion, four hundred thirty million, five hundred ninety-one thousand, six hundred eighty-nine".