5611500161 has 2 divisors, whose sum is σ = 5611500162. Its totient is φ = 5611500160.

The previous prime is 5611500157. The next prime is 5611500217. The reversal of 5611500161 is 1610051165.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4737706561 + 873793600 = 68831^2 + 29560^2 .

It is a cyclic number.

It is not a de Polignac number, because 5611500161 - 2² = 5611500157 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 5611500161.

It is not a weakly prime, because it can be changed into another prime (5611500101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2805750080 + 2805750081.

It is an arithmetic number, because the mean of its divisors is an integer number (2805750081).

Almost surely, 2^5611500161 is an apocalyptic number.

It is an amenable number.

5611500161 is a deficient number, since it is larger than the sum of its proper divisors (1).

5611500161 is an equidigital number, since it uses as much as digits as its factorization.

5611500161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 900, while the sum is 26.

The square root of 5611500161 is about 74909.9470097263. The cubic root of 5611500161 is about 1777.0227721922.

The spelling of 5611500161 in words is "five billion, six hundred eleven million, five hundred thousand, one hundred sixty-one".