5561085161 has 2 divisors, whose sum is σ = 5561085162. Its totient is φ = 5561085160.

The previous prime is 5561085109. The next prime is 5561085197. The reversal of 5561085161 is 1615801655.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5518261225 + 42823936 = 74285^2 + 6544^2 .

It is a cyclic number.

It is not a de Polignac number, because 5561085161 - 2²⁶ = 5493976297 is a prime.

It is not a weakly prime, because it can be changed into another prime (5561085461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2780542580 + 2780542581.

It is an arithmetic number, because the mean of its divisors is an integer number (2780542581).

Almost surely, 2^5561085161 is an apocalyptic number.

It is an amenable number.

5561085161 is a deficient number, since it is larger than the sum of its proper divisors (1).

5561085161 is an equidigital number, since it uses as much as digits as its factorization.

5561085161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36000, while the sum is 38.

The square root of 5561085161 is about 74572.6837454574. The cubic root of 5561085161 is about 1771.6850287185.

The spelling of 5561085161 in words is "five billion, five hundred sixty-one million, eighty-five thousand, one hundred sixty-one".