6500644525 has 12 divisors (see below), whose sum is σ = 8171223412. Its totient is φ = 5129274240.

The previous prime is 6500644519. The next prime is 6500644559. The reversal of 6500644525 is 5254460056.

6500644525 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 303491241 + 6197153284 = 17421^2 + 78722^2 .

It is not a de Polignac number, because 6500644525 - 2¹⁵ = 6500611757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1779174 + ... + 1782823.

Almost surely, 2^6500644525 is an apocalyptic number.

It is an amenable number.

6500644525 is a deficient number, since it is larger than the sum of its proper divisors (1670578887).

6500644525 is a wasteful number, since it uses less digits than its factorization.

6500644525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3562080 (or 3562075 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 37.

The square root of 6500644525 is about 80626.5745582683. The cubic root of 6500644525 is about 1866.3172609020.

The spelling of 6500644525 in words is "six billion, five hundred million, six hundred forty-four thousand, five hundred twenty-five".