6561206757616 has 40 divisors (see below), whose sum is σ = 14921045492960. Its totient is φ = 2735947217664.

The previous prime is 6561206757587. The next prime is 6561206757649. The reversal of 6561206757616 is 6167576021656.

It is a congruent 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, 791647251 + ... + 791655538.

It is an arithmetic number, because the mean of its divisors is an integer number (373026137324).

Almost surely, 2^{6561206757616} is an apocalyptic number.

It is an amenable number.

6561206757616 is an abundant number, since it is smaller than the sum of its proper divisors (8359838735344).

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

6561206757616 is a wasteful number, since it uses less digits than its factorization.

6561206757616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1583302841 (or 1583302835 counting only the distinct ones).

The product of its (nonzero) digits is 19051200, while the sum is 58.

The spelling of 6561206757616 in words is "six trillion, five hundred sixty-one billion, two hundred six million, seven hundred fifty-seven thousand, six hundred sixteen".