6545849985 has 24 divisors (see below), whose sum is σ = 11737388520. Its totient is φ = 3370735872.

The previous prime is 6545849969. The next prime is 6545850001. The reversal of 6545849985 is 5899485456.

6545849985 is a `hidden beast` number, since 6 + 545 + 8 + 4 + 9 + 9 + 85 = 666.

6545849985 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (6545849969) and next prime (6545850001).

It can be written as a sum of positive squares in 4 ways, for example, as 156725361 + 6389124624 = 12519^2 + 79932^2 .

It is not a de Polignac number, because 6545849985 - 2⁴ = 6545849969 is a prime.

It is a super-2 number, since 2×6545849985² = 85696304052249000450, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2506684 + ... + 2509293.

It is an arithmetic number, because the mean of its divisors is an integer number (489057855).

Almost surely, 2^6545849985 is an apocalyptic number.

It is an amenable number.

6545849985 is a deficient number, since it is larger than the sum of its proper divisors (5191538535).

6545849985 is a wasteful number, since it uses less digits than its factorization.

6545849985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5016017 (or 5016014 counting only the distinct ones).

The product of its digits is 62208000, while the sum is 63.

The square root of 6545849985 is about 80906.4273404777. The cubic root of 6545849985 is about 1870.6333928231.

The spelling of 6545849985 in words is "six billion, five hundred forty-five million, eight hundred forty-nine thousand, nine hundred eighty-five".