6543808061 has 4 divisors (see below), whose sum is σ = 7478637792. Its totient is φ = 5608978332.

The previous prime is 6543807997. The next prime is 6543808087. The reversal of 6543808061 is 1608083456.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6543808061 - 2⁶ = 6543807997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6543828061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 467414855 + ... + 467414868.

It is an arithmetic number, because the mean of its divisors is an integer number (1869659448).

Almost surely, 2^6543808061 is an apocalyptic number.

It is an amenable number.

6543808061 is a deficient number, since it is larger than the sum of its proper divisors (934829731).

6543808061 is an equidigital number, since it uses as much as digits as its factorization.

6543808061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 934829730.

The product of its (nonzero) digits is 138240, while the sum is 41.

The square root of 6543808061 is about 80893.8073093361. The cubic root of 6543808061 is about 1870.4388630335.

The spelling of 6543808061 in words is "six billion, five hundred forty-three million, eight hundred eight thousand, sixty-one".