6533531649 has 12 divisors (see below), whose sum is σ = 9441911700. Its totient is φ = 4353570144.

The previous prime is 6533531633. The next prime is 6533531651. The reversal of 6533531649 is 9461353356.

6533531649 is a `hidden beast` number, since 6 + 53 + 3 + 531 + 64 + 9 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1803531024 + 4730000625 = 42468^2 + 68775^2 .

It is not a de Polignac number, because 6533531649 - 2⁴ = 6533531633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6533530649) 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, 156814 + ... + 194055.

It is an arithmetic number, because the mean of its divisors is an integer number (786825975).

Almost surely, 2^6533531649 is an apocalyptic number.

It is an amenable number.

6533531649 is a deficient number, since it is larger than the sum of its proper divisors (2908380051).

6533531649 is a wasteful number, since it uses less digits than its factorization.

6533531649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352944 (or 352941 counting only the distinct ones).

The product of its digits is 874800, while the sum is 45.

The square root of 6533531649 is about 80830.2644372762. The cubic root of 6533531649 is about 1869.4592361473.

The spelling of 6533531649 in words is "six billion, five hundred thirty-three million, five hundred thirty-one thousand, six hundred forty-nine".