6564461187 has 4 divisors (see below), whose sum is σ = 8752614920. Its totient is φ = 4376307456.

The previous prime is 6564461143. The next prime is 6564461191. The reversal of 6564461187 is 7811644656.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 6564461187 - 2¹⁵ = 6564428419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6564461117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1094076862 + ... + 1094076867.

It is an arithmetic number, because the mean of its divisors is an integer number (2188153730).

Almost surely, 2^6564461187 is an apocalyptic number.

6564461187 is a deficient number, since it is larger than the sum of its proper divisors (2188153733).

6564461187 is a wasteful number, since it uses less digits than its factorization.

6564461187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2188153732.

The product of its digits is 967680, while the sum is 48.

The square root of 6564461187 is about 81021.3625348278. The cubic root of 6564461187 is about 1872.4045808217.

The spelling of 6564461187 in words is "six billion, five hundred sixty-four million, four hundred sixty-one thousand, one hundred eighty-seven".