6544400744 has 16 divisors (see below), whose sum is σ = 14023716000. Its totient is φ = 2804743152.

The previous prime is 6544400729. The next prime is 6544400791. The reversal of 6544400744 is 4470044456.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 6544400698 and 6544400707.

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 3 ways as a sum of consecutive naturals, for example, 58432094 + ... + 58432205.

It is an arithmetic number, because the mean of its divisors is an integer number (876482250).

Almost surely, 2^6544400744 is an apocalyptic number.

It is an amenable number.

6544400744 is an abundant number, since it is smaller than the sum of its proper divisors (7479315256).

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

6544400744 is a wasteful number, since it uses less digits than its factorization.

6544400744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116864312 (or 116864308 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 38.

The square root of 6544400744 is about 80897.4705661432. The cubic root of 6544400744 is about 1870.4953308597.

The spelling of 6544400744 in words is "six billion, five hundred forty-four million, four hundred thousand, seven hundred forty-four".