6549645 has 16 divisors (see below), whose sum is σ = 10526400. Its totient is φ = 3477504.

The previous prime is 6549619. The next prime is 6549671. The reversal of 6549645 is 5469456.

6549645 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (6549619) and next prime (6549671).

It is not a de Polignac number, because 6549645 - 2⁹ = 6549133 is a prime.

It is a super-3 number, since 3×6549645³ (a number of 21 digits) contains 333 as substring.

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3006 + ... + 4704.

It is an arithmetic number, because the mean of its divisors is an integer number (657900).

Almost surely, 2^6549645 is an apocalyptic number.

It is an amenable number.

6549645 is a deficient number, since it is larger than the sum of its proper divisors (3976755).

6549645 is a wasteful number, since it uses less digits than its factorization.

6549645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1964.

The product of its digits is 129600, while the sum is 39.

The square root of 6549645 is about 2559.2274224852. The cubic root of 6549645 is about 187.0994828457.

The spelling of 6549645 in words is "six million, five hundred forty-nine thousand, six hundred forty-five".