6556595349889 has 4 divisors (see below), whose sum is σ = 7060948838356. Its totient is φ = 6052241861424.

The previous prime is 6556595349869. The next prime is 6556595349949. The reversal of 6556595349889 is 9889435956556.

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 3984395249025 + 2572200100864 = 1996095^2 + 1603808^2 .

It is a cyclic number.

It is not a de Polignac number, because 6556595349889 - 2¹⁹ = 6556594825601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6556595349869) 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, 252176744214 + ... + 252176744239.

It is an arithmetic number, because the mean of its divisors is an integer number (1765237209589).

Almost surely, 2^{6556595349889} is an apocalyptic number.

It is an amenable number.

6556595349889 is a deficient number, since it is larger than the sum of its proper divisors (504353488467).

6556595349889 is a wasteful number, since it uses less digits than its factorization.

6556595349889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504353488466.

The product of its digits is 12597120000, while the sum is 82.

The spelling of 6556595349889 in words is "six trillion, five hundred fifty-six billion, five hundred ninety-five million, three hundred forty-nine thousand, eight hundred eighty-nine".