6543340655 has 8 divisors (see below), whose sum is σ = 8105299584. Its totient is φ = 5065812000.

The previous prime is 6543340649. The next prime is 6543340723. The reversal of 6543340655 is 5560433456.

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

It is not a de Polignac number, because 6543340655 - 2¹⁰ = 6543339631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21107396 + ... + 21107705.

It is an arithmetic number, because the mean of its divisors is an integer number (1013162448).

Almost surely, 2^6543340655 is an apocalyptic number.

6543340655 is a deficient number, since it is larger than the sum of its proper divisors (1561958929).

6543340655 is a wasteful number, since it uses less digits than its factorization.

6543340655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42215137.

The product of its (nonzero) digits is 648000, while the sum is 41.

The square root of 6543340655 is about 80890.9182479714. The cubic root of 6543340655 is about 1870.3943285588.

The spelling of 6543340655 in words is "six billion, five hundred forty-three million, three hundred forty thousand, six hundred fifty-five".