540611641 has 2 divisors, whose sum is σ = 540611642. Its totient is φ = 540611640.

The previous prime is 540611633. The next prime is 540611723. The reversal of 540611641 is 146116045.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 506925225 + 33686416 = 22515^2 + 5804^2 .

It is a cyclic number.

It is not a de Polignac number, because 540611641 - 2³ = 540611633 is a prime.

It is not a weakly prime, because it can be changed into another prime (540681641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 270305820 + 270305821.

It is an arithmetic number, because the mean of its divisors is an integer number (270305821).

Almost surely, 2^540611641 is an apocalyptic number.

It is an amenable number.

540611641 is a deficient number, since it is larger than the sum of its proper divisors (1).

540611641 is an equidigital number, since it uses as much as digits as its factorization.

540611641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 540611641 is about 23251.0567716824. The cubic root of 540611641 is about 814.6326225085.

Adding to 540611641 its reverse (146116045), we get a palindrome (686727686).

The spelling of 540611641 in words is "five hundred forty million, six hundred eleven thousand, six hundred forty-one".