6561053116565 has 16 divisors (see below), whose sum is σ = 7879501632000. Its totient is φ = 5244684904512.

The previous prime is 6561053116543. The next prime is 6561053116589. The reversal of 6561053116565 is 5656113501656.

It is a cyclic number.

It is not a de Polignac number, because 6561053116565 - 2²² = 6561048922261 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56038556 + ... + 56155514.

It is an arithmetic number, because the mean of its divisors is an integer number (492468852000).

Almost surely, 2^{6561053116565} is an apocalyptic number.

It is an amenable number.

6561053116565 is a deficient number, since it is larger than the sum of its proper divisors (1318448515435).

6561053116565 is a wasteful number, since it uses less digits than its factorization.

6561053116565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125756.

The product of its (nonzero) digits is 2430000, while the sum is 50.

The spelling of 6561053116565 in words is "six trillion, five hundred sixty-one billion, fifty-three million, one hundred sixteen thousand, five hundred sixty-five".