6540563 has 8 divisors (see below), whose sum is σ = 7043760. Its totient is φ = 6050560.

The previous prime is 6540557. The next prime is 6540587. The reversal of 6540563 is 3650456.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6540563 - 2¹⁰ = 6539539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6540593) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2258 + ... + 4263.

It is an arithmetic number, because the mean of its divisors is an integer number (880470).

Almost surely, 2^6540563 is an apocalyptic number.

6540563 is a deficient number, since it is larger than the sum of its proper divisors (503197).

6540563 is a wasteful number, since it uses less digits than its factorization.

6540563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6597.

The product of its (nonzero) digits is 10800, while the sum is 29.

The square root of 6540563 is about 2557.4524433506. The cubic root of 6540563 is about 187.0129629646.

The spelling of 6540563 in words is "six million, five hundred forty thousand, five hundred sixty-three".