5656616561565 has 96 divisors (see below), whose sum is σ = 10801296105600. Its totient is φ = 2831857770240.

The previous prime is 5656616561551. The next prime is 5656616561591. The reversal of 5656616561565 is 5651656166565.

5656616561565 is a `hidden beast` number, since 5 + 6 + 5 + 6 + 6 + 1 + 6 + 5 + 61 + 565 = 666.

It is not a de Polignac number, because 5656616561565 - 2¹⁸ = 5656616299421 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1392255 + ... + 3640275.

It is an arithmetic number, because the mean of its divisors is an integer number (112513501100).

Almost surely, 2^{5656616561565} is an apocalyptic number.

It is an amenable number.

5656616561565 is a deficient number, since it is larger than the sum of its proper divisors (5144679544035).

5656616561565 is a wasteful number, since it uses less digits than its factorization.

5656616561565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2248169 (or 2248157 counting only the distinct ones).

The product of its digits is 145800000, while the sum is 63.

The spelling of 5656616561565 in words is "five trillion, six hundred fifty-six billion, six hundred sixteen million, five hundred sixty-one thousand, five hundred sixty-five".