6579728845 has 4 divisors (see below), whose sum is σ = 7895674620. Its totient is φ = 5263783072.

The previous prime is 6579728843. The next prime is 6579728891. The reversal of 6579728845 is 5488279756.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4578687556 + 2001041289 = 67666^2 + 44733^2 .

It is a cyclic number.

It is not a de Polignac number, because 6579728845 - 2¹ = 6579728843 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6579728843) 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, 657972880 + ... + 657972889.

It is an arithmetic number, because the mean of its divisors is an integer number (1973918655).

Almost surely, 2^6579728845 is an apocalyptic number.

It is an amenable number.

6579728845 is a deficient number, since it is larger than the sum of its proper divisors (1315945775).

6579728845 is a wasteful number, since it uses less digits than its factorization.

6579728845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1315945774.

The product of its digits is 33868800, while the sum is 61.

The square root of 6579728845 is about 81115.5277674996. The cubic root of 6579728845 is about 1873.8550729885.

The spelling of 6579728845 in words is "six billion, five hundred seventy-nine million, seven hundred twenty-eight thousand, eight hundred forty-five".