6481644 has 24 divisors (see below), whose sum is σ = 16287600. Its totient is φ = 1994304.

The previous prime is 6481639. The next prime is 6481667. The reversal of 6481644 is 4461846.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 20619 + ... + 20930.

It is an arithmetic number, because the mean of its divisors is an integer number (678650).

Almost surely, 2^6481644 is an apocalyptic number.

It is an amenable number.

6481644 is an abundant number, since it is smaller than the sum of its proper divisors (9805956).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6481644 is a wasteful number, since it uses less digits than its factorization.

6481644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41569 (or 41567 counting only the distinct ones).

The product of its digits is 18432, while the sum is 33.

The square root of 6481644 is about 2545.9073038899. The cubic root of 6481644 is about 186.4497153520.

The spelling of 6481644 in words is "six million, four hundred eighty-one thousand, six hundred forty-four".