6581538485 has 8 divisors (see below), whose sum is σ = 7915839360. Its totient is φ = 5253235344.

The previous prime is 6581538413. The next prime is 6581538511. The reversal of 6581538485 is 5848351856.

It is a happy number.

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 6581538485 - 2²⁸ = 6313103029 is a prime.

It is a congruent 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, 1497017 + ... + 1501406.

It is an arithmetic number, because the mean of its divisors is an integer number (989479920).

Almost surely, 2^6581538485 is an apocalyptic number.

It is an amenable number.

6581538485 is a deficient number, since it is larger than the sum of its proper divisors (1334300875).

6581538485 is a wasteful number, since it uses less digits than its factorization.

6581538485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2998867.

The product of its digits is 4608000, while the sum is 53.

The square root of 6581538485 is about 81126.6817083011. The cubic root of 6581538485 is about 1874.0268476590.

The spelling of 6581538485 in words is "six billion, five hundred eighty-one million, five hundred thirty-eight thousand, four hundred eighty-five".