6543646101 has 16 divisors (see below), whose sum is σ = 10028577600. Its totient is φ = 4212001584.

The previous prime is 6543646091. The next prime is 6543646117. The reversal of 6543646101 is 1016463456.

It is a happy number.

6543646101 is a `hidden beast` number, since 6 + 5 + 4 + 3 + 646 + 1 + 0 + 1 = 666.

It is not a de Polignac number, because 6543646101 - 2¹¹ = 6543644053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6543646141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4177791 + ... + 4179356.

It is an arithmetic number, because the mean of its divisors is an integer number (626786100).

Almost surely, 2^6543646101 is an apocalyptic number.

It is an amenable number.

6543646101 is a deficient number, since it is larger than the sum of its proper divisors (3484931499).

6543646101 is a wasteful number, since it uses less digits than its factorization.

6543646101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8357185 (or 8357179 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 6543646101 is about 80892.8062376377. The cubic root of 6543646101 is about 1870.4234317140.

The spelling of 6543646101 in words is "six billion, five hundred forty-three million, six hundred forty-six thousand, one hundred one".