6545643 has 16 divisors (see below), whose sum is σ = 9601536. Its totient is φ = 3941280.

The previous prime is 6545641. The next prime is 6545653. The reversal of 6545643 is 3465456.

It is not a de Polignac number, because 6545643 - 2¹ = 6545641 is a prime.

It is a d-powerful number, because it can be written as 6⁴ + 5⁵ + 4⁴ + 5⁷ + 6⁸ + 4⁴ + 3¹⁴ .

It is not an unprimeable number, because it can be changed into a prime (6545641) 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 15 ways as a sum of consecutive naturals, for example, 48 + ... + 3618.

It is an arithmetic number, because the mean of its divisors is an integer number (600096).

Almost surely, 2^6545643 is an apocalyptic number.

6545643 is a deficient number, since it is larger than the sum of its proper divisors (3055893).

6545643 is a wasteful number, since it uses less digits than its factorization.

6545643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3634.

The product of its digits is 43200, while the sum is 33.

The square root of 6545643 is about 2558.4454264260. The cubic root of 6545643 is about 187.0613675642.

The spelling of 6545643 in words is "six million, five hundred forty-five thousand, six hundred forty-three".