5616549561 has 16 divisors (see below), whose sum is σ = 8930663424. Its totient is φ = 3069915024.

The previous prime is 5616549559. The next prime is 5616549571. The reversal of 5616549561 is 1659456165.

It is not a de Polignac number, because 5616549561 - 2¹ = 5616549559 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 5616549561.

It is not an unprimeable number, because it can be changed into a prime (5616549551) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5813751 + ... + 5814716.

It is an arithmetic number, because the mean of its divisors is an integer number (558166464).

Almost surely, 2^5616549561 is an apocalyptic number.

It is an amenable number.

5616549561 is a deficient number, since it is larger than the sum of its proper divisors (3314113863).

5616549561 is a wasteful number, since it uses less digits than its factorization.

5616549561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11628500.

The product of its digits is 972000, while the sum is 48.

The square root of 5616549561 is about 74943.6425655973. The cubic root of 5616549561 is about 1777.5556189361. Note that the first 3 decimals are identical.

The spelling of 5616549561 in words is "five billion, six hundred sixteen million, five hundred forty-nine thousand, five hundred sixty-one".