6556005650549 has 4 divisors (see below), whose sum is σ = 6556059672960. Its totient is φ = 6555951628140.

The previous prime is 6556005650479. The next prime is 6556005650561. The reversal of 6556005650549 is 9450565006556.

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 not a de Polignac number, because 6556005650549 - 2¹² = 6556005646453 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6556005650494 and 6556005650503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6556005659549) 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, 26828759 + ... + 27072020.

It is an arithmetic number, because the mean of its divisors is an integer number (1639014918240).

Almost surely, 2^{6556005650549} is an apocalyptic number.

It is an amenable number.

6556005650549 is a deficient number, since it is larger than the sum of its proper divisors (54022411).

6556005650549 is a wasteful number, since it uses less digits than its factorization.

6556005650549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54022410.

The product of its (nonzero) digits is 24300000, while the sum is 56.

The spelling of 6556005650549 in words is "six trillion, five hundred fifty-six billion, five million, six hundred fifty thousand, five hundred forty-nine".