6540855 has 16 divisors (see below), whose sum is σ = 10920960. Its totient is φ = 3336608.

The previous prime is 6540841. The next prime is 6540857. The reversal of 6540855 is 5580456.

It is a cyclic number.

It is not a de Polignac number, because 6540855 - 2¹⁰ = 6539831 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6540857) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9135 + ... + 9824.

It is an arithmetic number, because the mean of its divisors is an integer number (682560).

Almost surely, 2^6540855 is an apocalyptic number.

6540855 is a deficient number, since it is larger than the sum of its proper divisors (4380105).

6540855 is a wasteful number, since it uses less digits than its factorization.

6540855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18990.

The product of its (nonzero) digits is 24000, while the sum is 33.

The square root of 6540855 is about 2557.5095307740. The cubic root of 6540855 is about 187.0157459550.

The spelling of 6540855 in words is "six million, five hundred forty thousand, eight hundred fifty-five".