6543938085 has 8 divisors (see below), whose sum is σ = 10470300960. Its totient is φ = 3490100304.

The previous prime is 6543938057. The next prime is 6543938099. The reversal of 6543938085 is 5808393456.

It is a happy number.

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

It is not a de Polignac number, because 6543938085 - 2⁶ = 6543938021 is a prime.

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, 218131255 + ... + 218131284.

It is an arithmetic number, because the mean of its divisors is an integer number (1308787620).

Almost surely, 2^6543938085 is an apocalyptic number.

It is an amenable number.

6543938085 is a deficient number, since it is larger than the sum of its proper divisors (3926362875).

6543938085 is a wasteful number, since it uses less digits than its factorization.

6543938085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436262547.

The product of its (nonzero) digits is 3110400, while the sum is 51.

The square root of 6543938085 is about 80894.6109762573. The cubic root of 6543938085 is about 1870.4512513518.

The spelling of 6543938085 in words is "six billion, five hundred forty-three million, nine hundred thirty-eight thousand, eighty-five".