6564582505 has 8 divisors (see below), whose sum is σ = 8483460552. Its totient is φ = 4847691648.

The previous prime is 6564582473. The next prime is 6564582511. The reversal of 6564582505 is 5052854656.

It can be written as a sum of positive squares in 4 ways, for example, as 46280809 + 6518301696 = 6803^2 + 80736^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 6564582505 - 2⁵ = 6564582473 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50496724 + ... + 50496853.

It is an arithmetic number, because the mean of its divisors is an integer number (1060432569).

Almost surely, 2^6564582505 is an apocalyptic number.

6564582505 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

6564582505 is a deficient number, since it is larger than the sum of its proper divisors (1918878047).

6564582505 is a wasteful number, since it uses less digits than its factorization.

6564582505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100993595.

The product of its (nonzero) digits is 1440000, while the sum is 46.

The square root of 6564582505 is about 81022.1112104591. Note that the first 3 decimals coincide. The cubic root of 6564582505 is about 1872.4161154054.

The spelling of 6564582505 in words is "six billion, five hundred sixty-four million, five hundred eighty-two thousand, five hundred five".