5991543447 has 8 divisors (see below), whose sum is σ = 8336060544. Its totient is φ = 3820694328.

The previous prime is 5991543419. The next prime is 5991543451. The reversal of 5991543447 is 7443451995.

It is a happy number.

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

It is not a de Polignac number, because 5991543447 - 2⁸ = 5991543191 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 5991543447.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5991543247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43416913 + ... + 43417050.

It is an arithmetic number, because the mean of its divisors is an integer number (1042007568).

Almost surely, 2^5991543447 is an apocalyptic number.

5991543447 is a deficient number, since it is larger than the sum of its proper divisors (2344517097).

5991543447 is a wasteful number, since it uses less digits than its factorization.

5991543447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86833989.

The product of its digits is 2721600, while the sum is 51.

The square root of 5991543447 is about 77405.0608616775. The cubic root of 5991543447 is about 1816.2664927429.

The spelling of 5991543447 in words is "five billion, nine hundred ninety-one million, five hundred forty-three thousand, four hundred forty-seven".