6564789 has 24 divisors (see below), whose sum is σ = 11823552. Its totient is φ = 3409920.

The previous prime is 6564781. The next prime is 6564793. The reversal of 6564789 is 9874656.

6564789 is a `hidden beast` number, since 6 + 564 + 7 + 89 = 666.

It is not a de Polignac number, because 6564789 - 2³ = 6564781 is a prime.

It is a super-2 number, since 2×6564789² = 86192909229042, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6564781) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4044 + ... + 5429.

It is an arithmetic number, because the mean of its divisors is an integer number (492648).

Almost surely, 2^6564789 is an apocalyptic number.

It is an amenable number.

6564789 is a deficient number, since it is larger than the sum of its proper divisors (5258763).

6564789 is a wasteful number, since it uses less digits than its factorization.

6564789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9497 (or 9494 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 6564789 is about 2562.1844195920. The cubic root of 6564789 is about 187.2435748058.

It can be divided in two parts, 656 and 4789, that added together give a palindrome (5445).

The spelling of 6564789 in words is "six million, five hundred sixty-four thousand, seven hundred eighty-nine".