6463391873 has 8 divisors (see below), whose sum is σ = 6555830400. Its totient is φ = 6371219088.

The previous prime is 6463391833. The next prime is 6463391917. The reversal of 6463391873 is 3781933646.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6463391873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6463391833) 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 7 ways as a sum of consecutive naturals, for example, 17186 + ... + 114987.

It is an arithmetic number, because the mean of its divisors is an integer number (819478800).

Almost surely, 2^6463391873 is an apocalyptic number.

It is an amenable number.

6463391873 is a deficient number, since it is larger than the sum of its proper divisors (92438527).

6463391873 is a wasteful number, since it uses less digits than its factorization.

6463391873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132871.

The product of its digits is 1959552, while the sum is 50.

The square root of 6463391873 is about 80395.2229488792. Note that the first 3 decimals coincide. The cubic root of 6463391873 is about 1862.7453843501.

The spelling of 6463391873 in words is "six billion, four hundred sixty-three million, three hundred ninety-one thousand, eight hundred seventy-three".