6541454721056 has 24 divisors (see below), whose sum is σ = 12879643775040. Its totient is φ = 3270434079808.

The previous prime is 6541454721047. The next prime is 6541454721073. The reversal of 6541454721056 is 6501274541456.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 6541454720995 and 6541454721013.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8802356 + ... + 9516531.

It is an arithmetic number, because the mean of its divisors is an integer number (536651823960).

Almost surely, 2^{6541454721056} is an apocalyptic number.

It is an amenable number.

6541454721056 is a deficient number, since it is larger than the sum of its proper divisors (6338189053984).

6541454721056 is a wasteful number, since it uses less digits than its factorization.

6541454721056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18330056 (or 18330048 counting only the distinct ones).

The product of its (nonzero) digits is 4032000, while the sum is 50.

The spelling of 6541454721056 in words is "six trillion, five hundred forty-one billion, four hundred fifty-four million, seven hundred twenty-one thousand, fifty-six".