6718564485 has 12 divisors (see below), whose sum is σ = 11645511852. Its totient is φ = 3583234368.

The previous prime is 6718564453. The next prime is 6718564487. The reversal of 6718564485 is 5844658176.

6718564485 is a `hidden beast` number, since 6 + 71 + 8 + 564 + 4 + 8 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 773229249 + 5945335236 = 27807^2 + 77106^2 .

It is not a de Polignac number, because 6718564485 - 2⁵ = 6718564453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6718564487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 74650672 + ... + 74650761.

It is an arithmetic number, because the mean of its divisors is an integer number (970459321).

Almost surely, 2^6718564485 is an apocalyptic number.

It is an amenable number.

6718564485 is a deficient number, since it is larger than the sum of its proper divisors (4926947367).

6718564485 is a wasteful number, since it uses less digits than its factorization.

6718564485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149301444 (or 149301441 counting only the distinct ones).

The product of its digits is 6451200, while the sum is 54.

The square root of 6718564485 is about 81966.8499150724. The cubic root of 6718564485 is about 1886.9432111194.

The spelling of 6718564485 in words is "six billion, seven hundred eighteen million, five hundred sixty-four thousand, four hundred eighty-five".