6564538 has 8 divisors (see below), whose sum is σ = 10365120. Its totient is φ = 3109500.

The previous prime is 6564521. The next prime is 6564539. The reversal of 6564538 is 8354656.

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

It is a junction number, because it is equal to n+sod(n) for n = 6564497 and 6564506.

It is not an unprimeable number, because it can be changed into a prime (6564539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86338 + ... + 86413.

It is an arithmetic number, because the mean of its divisors is an integer number (1295640).

Almost surely, 2^6564538 is an apocalyptic number.

6564538 is a deficient number, since it is larger than the sum of its proper divisors (3800582).

6564538 is a wasteful number, since it uses less digits than its factorization.

6564538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172772.

The product of its digits is 86400, while the sum is 37.

The square root of 6564538 is about 2562.1354374818. The cubic root of 6564538 is about 187.2411884008.

The spelling of 6564538 in words is "six million, five hundred sixty-four thousand, five hundred thirty-eight".