5616055561 has 4 divisors (see below), whose sum is σ = 5616518292. Its totient is φ = 5615592832.

The previous prime is 5616055517. The next prime is 5616055583. The reversal of 5616055561 is 1655506165.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1655506165 = 5 ⋅331101233.

It can be written as a sum of positive squares in 2 ways, for example, as 5136445561 + 479610000 = 71669^2 + 21900^2 .

It is a cyclic number.

It is not a de Polignac number, because 5616055561 - 2⁷ = 5616055433 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5616055261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 212656 + ... + 237601.

It is an arithmetic number, because the mean of its divisors is an integer number (1404129573).

Almost surely, 2^5616055561 is an apocalyptic number.

It is an amenable number.

5616055561 is a deficient number, since it is larger than the sum of its proper divisors (462731).

5616055561 is a wasteful number, since it uses less digits than its factorization.

5616055561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462730.

The product of its (nonzero) digits is 135000, while the sum is 40.

The square root of 5616055561 is about 74940.3466832120. The cubic root of 5616055561 is about 1777.5035028215.

The spelling of 5616055561 in words is "five billion, six hundred sixteen million, fifty-five thousand, five hundred sixty-one".