5561491169 has 8 divisors (see below), whose sum is σ = 6048599592. Its totient is φ = 5082854400.

The previous prime is 5561491141. The next prime is 5561491181. The reversal of 5561491169 is 9611941655.

5561491169 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1780840000 + 3780651169 = 42200^2 + 61487^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 5561491169 - 2²⁰ = 5560442593 is a prime.

It is a super-2 number, since 2×5561491169² = 61860368045729973122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5561491139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2116544 + ... + 2119169.

It is an arithmetic number, because the mean of its divisors is an integer number (756074949).

Almost surely, 2^5561491169 is an apocalyptic number.

It is an amenable number.

5561491169 is a deficient number, since it is larger than the sum of its proper divisors (487108423).

5561491169 is a wasteful number, since it uses less digits than its factorization.

5561491169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4235827.

The product of its digits is 291600, while the sum is 47.

The square root of 5561491169 is about 74575.4059258144. The cubic root of 5561491169 is about 1771.7281438522.

The spelling of 5561491169 in words is "five billion, five hundred sixty-one million, four hundred ninety-one thousand, one hundred sixty-nine".