5610166565561 has 4 divisors (see below), whose sum is σ = 5610225467124. Its totient is φ = 5610107664000.

The previous prime is 5610166565551. The next prime is 5610166565567. The reversal of 5610166565561 is 1655656610165.

5610166565561 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 433431306025 + 5176735259536 = 658355^2 + 2275244^2 .

It is a cyclic number.

It is not a de Polignac number, because 5610166565561 - 2¹⁴ = 5610166549177 is a prime.

It is a super-2 number, since 2×5610166565561² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (5610166565567) 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, 29307680 + ... + 29498481.

It is an arithmetic number, because the mean of its divisors is an integer number (1402556366781).

Almost surely, 2^{5610166565561} is an apocalyptic number.

It is an amenable number.

5610166565561 is a deficient number, since it is larger than the sum of its proper divisors (58901563).

5610166565561 is an equidigital number, since it uses as much as digits as its factorization.

5610166565561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58901562.

The product of its (nonzero) digits is 4860000, while the sum is 53.

The spelling of 5610166565561 in words is "five trillion, six hundred ten billion, one hundred sixty-six million, five hundred sixty-five thousand, five hundred sixty-one".