6543663457 has 8 divisors (see below), whose sum is σ = 6632144640. Its totient is φ = 6455323680.

The previous prime is 6543663437. The next prime is 6543663481. The reversal of 6543663457 is 7543663456.

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

It is a cyclic number.

It is not a de Polignac number, because 6543663457 - 2¹¹ = 6543661409 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 6543663457.

It is not an unprimeable number, because it can be changed into a prime (6543663437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59532 + ... + 128962.

It is an arithmetic number, because the mean of its divisors is an integer number (829018080).

Almost surely, 2^6543663457 is an apocalyptic number.

It is an amenable number.

6543663457 is a deficient number, since it is larger than the sum of its proper divisors (88481183).

6543663457 is a wasteful number, since it uses less digits than its factorization.

6543663457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70703.

The product of its digits is 5443200, while the sum is 49.

The square root of 6543663457 is about 80892.9135153383. The cubic root of 6543663457 is about 1870.4250853813.

Subtracting 6543663457 from its reverse (7543663456), we obtain a palindrome (999999999).

The spelling of 6543663457 in words is "six billion, five hundred forty-three million, six hundred sixty-three thousand, four hundred fifty-seven".