4521066509 has 4 divisors (see below), whose sum is σ = 4523578620. Its totient is φ = 4518554400.

The previous prime is 4521066493. The next prime is 4521066533. The reversal of 4521066509 is 9056601254.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9056601254 = 2 ⋅4528300627.

It can be written as a sum of positive squares in 2 ways, for example, as 554838025 + 3966228484 = 23555^2 + 62978^2 .

It is a cyclic number.

It is not a de Polignac number, because 4521066509 - 2⁴ = 4521066493 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 (4521066559) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1253354 + ... + 1256955.

It is an arithmetic number, because the mean of its divisors is an integer number (1130894655).

Almost surely, 2^4521066509 is an apocalyptic number.

It is an amenable number.

4521066509 is a deficient number, since it is larger than the sum of its proper divisors (2512111).

4521066509 is a wasteful number, since it uses less digits than its factorization.

4521066509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2512110.

The product of its (nonzero) digits is 64800, while the sum is 38.

The square root of 4521066509 is about 67238.8764703873. The cubic root of 4521066509 is about 1653.5359138649.

The spelling of 4521066509 in words is "four billion, five hundred twenty-one million, sixty-six thousand, five hundred nine".