5661543161 has 8 divisors (see below), whose sum is σ = 5683353984. Its totient is φ = 5639773360.

The previous prime is 5661543119. The next prime is 5661543169. The reversal of 5661543161 is 1613451665.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5661543161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5661543169) 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 7 ways as a sum of consecutive naturals, for example, 282086 + ... + 301488.

It is an arithmetic number, because the mean of its divisors is an integer number (710419248).

Almost surely, 2^5661543161 is an apocalyptic number.

It is an amenable number.

5661543161 is a deficient number, since it is larger than the sum of its proper divisors (21810823).

5661543161 is a wasteful number, since it uses less digits than its factorization.

5661543161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20511.

The product of its digits is 64800, while the sum is 38.

The square root of 5661543161 is about 75243.2266785523. The cubic root of 5661543161 is about 1782.2896051802.

The spelling of 5661543161 in words is "five billion, six hundred sixty-one million, five hundred forty-three thousand, one hundred sixty-one".