6549047947 has 12 divisors (see below), whose sum is σ = 7093892520. Its totient is φ = 6043297728.

The previous prime is 6549047929. The next prime is 6549047969. The reversal of 6549047947 is 7497409456.

It is a de Polignac number, because none of the positive numbers 2^k-6549047947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6549047977) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 866079 + ... + 873607.

It is an arithmetic number, because the mean of its divisors is an integer number (591157710).

Almost surely, 2^6549047947 is an apocalyptic number.

6549047947 is a deficient number, since it is larger than the sum of its proper divisors (544844573).

6549047947 is a wasteful number, since it uses less digits than its factorization.

6549047947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12702 (or 12689 counting only the distinct ones).

The product of its (nonzero) digits is 7620480, while the sum is 55.

The square root of 6549047947 is about 80926.1882643684. The cubic root of 6549047947 is about 1870.9379746363.

The spelling of 6549047947 in words is "six billion, five hundred forty-nine million, forty-seven thousand, nine hundred forty-seven".