6579889409 has 4 divisors (see below), whose sum is σ = 6719887104. Its totient is φ = 6439891716.

The previous prime is 6579889361. The next prime is 6579889447. The reversal of 6579889409 is 9049889756.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6579889409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6579889109) 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, 69998777 + ... + 69998870.

It is an arithmetic number, because the mean of its divisors is an integer number (1679971776).

Almost surely, 2^6579889409 is an apocalyptic number.

It is an amenable number.

6579889409 is a deficient number, since it is larger than the sum of its proper divisors (139997695).

6579889409 is a wasteful number, since it uses less digits than its factorization.

6579889409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139997694.

The product of its (nonzero) digits is 39191040, while the sum is 65.

The square root of 6579889409 is about 81116.5174856515. The cubic root of 6579889409 is about 1873.8703153197.

The spelling of 6579889409 in words is "six billion, five hundred seventy-nine million, eight hundred eighty-nine thousand, four hundred nine".