540065322161 has 2 divisors, whose sum is σ = 540065322162. Its totient is φ = 540065322160.

The previous prime is 540065322133. The next prime is 540065322163. The reversal of 540065322161 is 161223560045.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 516385960000 + 23679362161 = 718600^2 + 153881^2 .

It is a cyclic number.

It is not a de Polignac number, because 540065322161 - 2²² = 540061127857 is a prime.

Together with 540065322163, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (540065322163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 270032661080 + 270032661081.

It is an arithmetic number, because the mean of its divisors is an integer number (270032661081).

Almost surely, 2^540065322161 is an apocalyptic number.

It is an amenable number.

540065322161 is a deficient number, since it is larger than the sum of its proper divisors (1).

540065322161 is an equidigital number, since it uses as much as digits as its factorization.

540065322161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43200, while the sum is 35.

The spelling of 540065322161 in words is "five hundred forty billion, sixty-five million, three hundred twenty-two thousand, one hundred sixty-one".