6540811 has 4 divisors (see below), whose sum is σ = 6546400. Its totient is φ = 6535224.

The previous prime is 6540739. The next prime is 6540827. The reversal of 6540811 is 1180456.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 6540811 - 2⁹ = 6540299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6540841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 291 + ... + 3628.

It is an arithmetic number, because the mean of its divisors is an integer number (1636600).

Almost surely, 2^6540811 is an apocalyptic number.

6540811 is a deficient number, since it is larger than the sum of its proper divisors (5589).

6540811 is a wasteful number, since it uses less digits than its factorization.

6540811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5588.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 6540811 is about 2557.5009286411. The cubic root of 6540811 is about 187.0153266056.

The spelling of 6540811 in words is "six million, five hundred forty thousand, eight hundred eleven".