6544946636 has 12 divisors (see below), whose sum is σ = 11456608128. Its totient is φ = 3271630032.

The previous prime is 6544946557. The next prime is 6544946689. The reversal of 6544946636 is 6366494456.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 193196 + ... + 224531.

It is an arithmetic number, because the mean of its divisors is an integer number (954717344).

Almost surely, 2^6544946636 is an apocalyptic number.

It is an amenable number.

6544946636 is a deficient number, since it is larger than the sum of its proper divisors (4911661492).

6544946636 is a wasteful number, since it uses less digits than its factorization.

6544946636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421648 (or 421646 counting only the distinct ones).

The product of its digits is 11197440, while the sum is 53.

The square root of 6544946636 is about 80900.8444702526. The cubic root of 6544946636 is about 1870.5473376610.

The spelling of 6544946636 in words is "six billion, five hundred forty-four million, nine hundred forty-six thousand, six hundred thirty-six".