6544404012 has 24 divisors (see below), whose sum is σ = 15271846912. Its totient is φ = 2181243600.

The previous prime is 6544404011. The next prime is 6544404019. The reversal of 6544404012 is 2104044456.

It is a happy number.

It is a super-2 number, since 2×6544404012² = 85658447744563392288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6544404011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128337 + ... + 171927.

Almost surely, 2^6544404012 is an apocalyptic number.

It is an amenable number.

6544404012 is an abundant number, since it is smaller than the sum of its proper divisors (8727442900).

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

6544404012 is a wasteful number, since it uses less digits than its factorization.

6544404012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56109 (or 56107 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 30.

The square root of 6544404012 is about 80897.4907645472. The cubic root of 6544404012 is about 1870.4956422087.

Adding to 6544404012 its reverse (2104044456), we get a palindrome (8648448468).

The spelling of 6544404012 in words is "six billion, five hundred forty-four million, four hundred four thousand, twelve".