6504640533 has 6 divisors (see below), whose sum is σ = 9395591894. Its totient is φ = 4336427016.

The previous prime is 6504640517. The next prime is 6504640559. The reversal of 6504640533 is 3350464056.

6504640533 is a `hidden beast` number, since 6 + 5 + 0 + 4 + 640 + 5 + 3 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 5764909329 + 739731204 = 75927^2 + 27198^2 .

It is not a de Polignac number, because 6504640533 - 2⁴ = 6504640517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6504640033) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 361368910 + ... + 361368927.

Almost surely, 2^6504640533 is an apocalyptic number.

It is an amenable number.

6504640533 is a deficient number, since it is larger than the sum of its proper divisors (2890951361).

6504640533 is a wasteful number, since it uses less digits than its factorization.

6504640533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 722737843 (or 722737840 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 36.

The square root of 6504640533 is about 80651.3517121691. The cubic root of 6504640533 is about 1866.6995968928.

It can be divided in two parts, 650464053 and 3, that added together give a palindrome (650464056).

The spelling of 6504640533 in words is "six billion, five hundred four million, six hundred forty thousand, five hundred thirty-three".