5616565561 has 4 divisors (see below), whose sum is σ = 5629360000. Its totient is φ = 5603771124.

The previous prime is 5616565541. The next prime is 5616565583. The reversal of 5616565561 is 1655656165.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5616565561 is a prime.

It is a super-2 number, since 2×5616565561² = 63091617402022489442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5616565501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6396561 + ... + 6397438.

It is an arithmetic number, because the mean of its divisors is an integer number (1407340000).

Almost surely, 2^5616565561 is an apocalyptic number.

It is an amenable number.

5616565561 is a deficient number, since it is larger than the sum of its proper divisors (12794439).

5616565561 is a wasteful number, since it uses less digits than its factorization.

5616565561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12794438.

The product of its digits is 810000, while the sum is 46.

The square root of 5616565561 is about 74943.7493124010. The cubic root of 5616565561 is about 1777.5573068564.

The spelling of 5616565561 in words is "five billion, six hundred sixteen million, five hundred sixty-five thousand, five hundred sixty-one".