6549717889 has 32 divisors (see below), whose sum is σ = 8306323200. Its totient is φ = 5075938560.

The previous prime is 6549717871. The next prime is 6549717901. The reversal of 6549717889 is 9887179456.

It is a de Polignac number, because none of the positive numbers 2^k-6549717889 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6549717889.

It is not an unprimeable number, because it can be changed into a prime (6549717809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 61047 + ... + 129715.

It is an arithmetic number, because the mean of its divisors is an integer number (259572600).

Almost surely, 2^6549717889 is an apocalyptic number.

It is an amenable number.

6549717889 is a deficient number, since it is larger than the sum of its proper divisors (1756605311).

6549717889 is a wasteful number, since it uses less digits than its factorization.

6549717889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68745.

The product of its digits is 30481920, while the sum is 64.

The square root of 6549717889 is about 80930.3273748476. The cubic root of 6549717889 is about 1871.0017690077.

The spelling of 6549717889 in words is "six billion, five hundred forty-nine million, seven hundred seventeen thousand, eight hundred eighty-nine".