6561333686080 has 28 divisors (see below), whose sum is σ = 15624175840740. Its totient is φ = 2624533474304.

The previous prime is 6561333686023. The next prime is 6561333686107. The reversal of 6561333686080 is 806863331656.

It can be written as a sum of positive squares in 2 ways, for example, as 4063062615616 + 2498271070464 = 2015704^2 + 1580592^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10252083565 + ... + 10252084204.

Almost surely, 2^{6561333686080} is an apocalyptic number.

It is an amenable number.

6561333686080 is an abundant number, since it is smaller than the sum of its proper divisors (9062842154660).

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

6561333686080 is a wasteful number, since it uses less digits than its factorization.

6561333686080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20504167786 (or 20504167776 counting only the distinct ones).

The product of its (nonzero) digits is 11197440, while the sum is 55.

The spelling of 6561333686080 in words is "six trillion, five hundred sixty-one billion, three hundred thirty-three million, six hundred eighty-six thousand, eighty".