5611142161 has 2 divisors, whose sum is σ = 5611142162. Its totient is φ = 5611142160.

The previous prime is 5611142129. The next prime is 5611142191. The reversal of 5611142161 is 1612411165.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4024633600 + 1586508561 = 63440^2 + 39831^2 .

It is a cyclic number.

It is not a de Polignac number, because 5611142161 - 2⁵ = 5611142129 is a prime.

It is not a weakly prime, because it can be changed into another prime (5611142191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2805571080 + 2805571081.

It is an arithmetic number, because the mean of its divisors is an integer number (2805571081).

Almost surely, 2^5611142161 is an apocalyptic number.

It is an amenable number.

5611142161 is a deficient number, since it is larger than the sum of its proper divisors (1).

5611142161 is an equidigital number, since it uses as much as digits as its factorization.

5611142161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1440, while the sum is 28.

The square root of 5611142161 is about 74907.5574358155. The cubic root of 5611142161 is about 1776.9849814849.

The spelling of 5611142161 in words is "five billion, six hundred eleven million, one hundred forty-two thousand, one hundred sixty-one".