6564247438 has 16 divisors (see below), whose sum is σ = 11369008224. Its totient is φ = 2784245760.

The previous prime is 6564247409. The next prime is 6564247439. The reversal of 6564247438 is 8347424656.

It is a junction number, because it is equal to n+sod(n) for n = 6564247391 and 6564247400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6564247439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2415523 + ... + 2418238.

It is an arithmetic number, because the mean of its divisors is an integer number (710563014).

Almost surely, 2^6564247438 is an apocalyptic number.

6564247438 is a deficient number, since it is larger than the sum of its proper divisors (4804760786).

6564247438 is a wasteful number, since it uses less digits than its factorization.

6564247438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4833867.

The product of its digits is 3870720, while the sum is 49.

The square root of 6564247438 is about 81020.0434337084. The cubic root of 6564247438 is about 1872.3842578057.

The spelling of 6564247438 in words is "six billion, five hundred sixty-four million, two hundred forty-seven thousand, four hundred thirty-eight".