6561006616000 has 56 divisors (see below), whose sum is σ = 16248332904336. Its totient is φ = 2624402643200.

The previous prime is 6561006615967. The next prime is 6561006616039. The reversal of 6561006616000 is 6166001656.

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, 410054914 + ... + 410070913.

Almost surely, 2^{6561006616000} is an apocalyptic number.

It is an amenable number.

6561006616000 is an abundant number, since it is smaller than the sum of its proper divisors (9687326288336).

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

6561006616000 is an equidigital number, since it uses as much as digits as its factorization.

6561006616000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 820125854 (or 820125834 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 37.

The spelling of 6561006616000 in words is "six trillion, five hundred sixty-one billion, six million, six hundred sixteen thousand".