6559889557 has 8 divisors (see below), whose sum is σ = 7129309880. Its totient is φ = 5999728320.

The previous prime is 6559889543. The next prime is 6559889591. The reversal of 6559889557 is 7559889556.

It can be written as a sum of positive squares in 4 ways, for example, as 16859236 + 6543030321 = 4106^2 + 80889^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6559889557 - 2¹⁵ = 6559856789 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6559889492 and 6559889501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6559889537) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2313294 + ... + 2316127.

It is an arithmetic number, because the mean of its divisors is an integer number (891163735).

Almost surely, 2^6559889557 is an apocalyptic number.

It is an amenable number.

6559889557 is a deficient number, since it is larger than the sum of its proper divisors (569420323).

6559889557 is a wasteful number, since it uses less digits than its factorization.

6559889557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4629543.

The product of its digits is 136080000, while the sum is 67.

The square root of 6559889557 is about 80993.1451235226. The cubic root of 6559889557 is about 1871.9698191260.

Subtracting 6559889557 from its reverse (7559889556), we obtain a palindrome (999999999).

The spelling of 6559889557 in words is "six billion, five hundred fifty-nine million, eight hundred eighty-nine thousand, five hundred fifty-seven".