7999663543 has 8 divisors (see below), whose sum is σ = 8285921280. Its totient is φ = 7714099680.

The previous prime is 7999663519. The next prime is 7999663549. The reversal of 7999663543 is 3453669997.

7999663543 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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-7999663543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7999663549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 149943 + ... + 196168.

It is an arithmetic number, because the mean of its divisors is an integer number (1035740160).

Almost surely, 2^7999663543 is an apocalyptic number.

7999663543 is a deficient number, since it is larger than the sum of its proper divisors (286257737).

7999663543 is a wasteful number, since it uses less digits than its factorization.

7999663543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346937.

The product of its digits is 33067440, while the sum is 61.

The square root of 7999663543 is about 89440.8382284066. The cubic root of 7999663543 is about 1999.9719615236.

The spelling of 7999663543 in words is "seven billion, nine hundred ninety-nine million, six hundred sixty-three thousand, five hundred forty-three".