540817811 has 4 divisors (see below), whose sum is σ = 542729112. Its totient is φ = 538906512.

The previous prime is 540817807. The next prime is 540817813. The reversal of 540817811 is 118718045.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 540817811 - 2² = 540817807 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (540817813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 955226 + ... + 955791.

It is an arithmetic number, because the mean of its divisors is an integer number (135682278).

Almost surely, 2^540817811 is an apocalyptic number.

540817811 is a deficient number, since it is larger than the sum of its proper divisors (1911301).

540817811 is a wasteful number, since it uses less digits than its factorization.

540817811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1911300.

The product of its (nonzero) digits is 8960, while the sum is 35.

The square root of 540817811 is about 23255.4899109866. The cubic root of 540817811 is about 814.7361666236.

The spelling of 540817811 in words is "five hundred forty million, eight hundred seventeen thousand, eight hundred eleven".