4527809521 has 3 divisors (see below), whose sum is σ = 4527876811. Its totient is φ = 4527742232.

The previous prime is 4527809483. The next prime is 4527809537. The reversal of 4527809521 is 1259087254.

The square root of 4527809521 is 67289.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1259087254 = 2 ⋅629543627.

It can be written as a sum of positive squares in only one way, i.e., 370139121 + 4157670400 = 19239^2 + 64480^2 .

It is not a de Polignac number, because 4527809521 - 2⁹ = 4527809009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4527809021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 33645 + ... + 100933.

Almost surely, 2^4527809521 is an apocalyptic number.

4527809521 is the 67289-th square number.

4527809521 is the 33645-th centered octagonal number.

It is an amenable number.

4527809521 is a deficient number, since it is larger than the sum of its proper divisors (67290).

4527809521 is an frugal number, since it uses more digits than its factorization.

4527809521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134578 (or 67289 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 43.

The cubic root of 4527809521 is about 1654.3575691013.

The spelling of 4527809521 in words is "four billion, five hundred twenty-seven million, eight hundred nine thousand, five hundred twenty-one".