6544645 has 8 divisors (see below), whose sum is σ = 8267040. Its totient is φ = 4960080.

The previous prime is 6544639. The next prime is 6544649. The reversal of 6544645 is 5464456.

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

It is not a de Polignac number, because 6544645 - 2²¹ = 4447493 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6544645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6544649) 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, 34351 + ... + 34540.

It is an arithmetic number, because the mean of its divisors is an integer number (1033380).

Almost surely, 2^6544645 is an apocalyptic number.

It is an amenable number.

6544645 is a deficient number, since it is larger than the sum of its proper divisors (1722395).

6544645 is a wasteful number, since it uses less digits than its factorization.

6544645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68915.

The product of its digits is 57600, while the sum is 34.

The square root of 6544645 is about 2558.2503786768. The cubic root of 6544645 is about 187.0518601339.

The spelling of 6544645 in words is "six million, five hundred forty-four thousand, six hundred forty-five".