6543505653 has 8 divisors (see below), whose sum is σ = 8725948416. Its totient is φ = 4361700000.

The previous prime is 6543505613. The next prime is 6543505667. The reversal of 6543505653 is 3565053456.

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

It is not a de Polignac number, because 6543505653 - 2²¹ = 6541408501 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6543505613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134773 + ... + 176778.

It is an arithmetic number, because the mean of its divisors is an integer number (1090743552).

Almost surely, 2^6543505653 is an apocalyptic number.

It is an amenable number.

6543505653 is a deficient number, since it is larger than the sum of its proper divisors (2182442763).

6543505653 is a wasteful number, since it uses less digits than its factorization.

6543505653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318555.

The product of its (nonzero) digits is 810000, while the sum is 42.

The square root of 6543505653 is about 80891.9381211750. The cubic root of 6543505653 is about 1870.4100498214.

The spelling of 6543505653 in words is "six billion, five hundred forty-three million, five hundred five thousand, six hundred fifty-three".