6543751605 has 16 divisors (see below), whose sum is σ = 11085885504. Its totient is φ = 3284706560.

The previous prime is 6543751589. The next prime is 6543751631. The reversal of 6543751605 is 5061573456.

It is not a de Polignac number, because 6543751605 - 2⁴ = 6543751589 is a prime.

It is a super-4 number, since 4×6543751605⁴ (a number of 40 digits) contains 4444 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12830631 + ... + 12831140.

It is an arithmetic number, because the mean of its divisors is an integer number (692867844).

Almost surely, 2^6543751605 is an apocalyptic number.

It is an amenable number.

6543751605 is a deficient number, since it is larger than the sum of its proper divisors (4542133899).

6543751605 is a wasteful number, since it uses less digits than its factorization.

6543751605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25661796.

The product of its (nonzero) digits is 378000, while the sum is 42.

The square root of 6543751605 is about 80893.4583572739. The cubic root of 6543751605 is about 1870.4334840146.

The spelling of 6543751605 in words is "six billion, five hundred forty-three million, seven hundred fifty-one thousand, six hundred five".