6544408072 has 32 divisors (see below), whose sum is σ = 12346286400. Its totient is φ = 3252110400.

The previous prime is 6544408061. The next prime is 6544408097. The reversal of 6544408072 is 2708044456.

It is a happy 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, 1413922 + ... + 1418542.

It is an arithmetic number, because the mean of its divisors is an integer number (385821450).

Almost surely, 2^6544408072 is an apocalyptic number.

It is an amenable number.

6544408072 is a deficient number, since it is larger than the sum of its proper divisors (5801878328).

6544408072 is a wasteful number, since it uses less digits than its factorization.

6544408072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5677 (or 5673 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 40.

The square root of 6544408072 is about 80897.5158580287. The cubic root of 6544408072 is about 1870.4960290130.

The spelling of 6544408072 in words is "six billion, five hundred forty-four million, four hundred eight thousand, seventy-two".