65545525 has 18 divisors (see below), whose sum is σ = 82401410. Its totient is φ = 51719520.

The previous prime is 65545507. The next prime is 65545541. The reversal of 65545525 is 52554556.

65545525 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

65545525 is a nontrivial binomial coefficient, being equal to C(11450, 2).

It can be written as a sum of positive squares in 3 ways, for example, as 15673681 + 49871844 = 3959^2 + 7062^2 .

It is not a de Polignac number, because 65545525 - 2¹⁹ = 65021237 is a prime.

It is a congruent number.

It is an unprimeable number.

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 17 ways as a sum of consecutive naturals, for example, 286111 + ... + 286339.

Almost surely, 2^65545525 is an apocalyptic number.

65545525 is the 11449-th triangular number and also the 5725-th hexagonal number.

65545525 is the 3817-th centered nonagonal number.

It is an amenable number.

65545525 is a deficient number, since it is larger than the sum of its proper divisors (16855885).

65545525 is a wasteful number, since it uses less digits than its factorization.

65545525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 453 (or 341 counting only the distinct ones).

The product of its digits is 150000, while the sum is 37.

The square root of 65545525 is about 8096.0190834755. The cubic root of 65545525 is about 403.1942674876.

The spelling of 65545525 in words is "sixty-five million, five hundred forty-five thousand, five hundred twenty-five".