4450521521 has 4 divisors (see below), whose sum is σ = 4473581412. Its totient is φ = 4427461632.

The previous prime is 4450521497. The next prime is 4450521527. The reversal of 4450521521 is 1251250544.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3120898225 + 1329623296 = 55865^2 + 36464^2 .

It is a cyclic number.

It is not a de Polignac number, because 4450521521 - 2¹⁸ = 4450259377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4450521527) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 11529656 + ... + 11530041.

It is an arithmetic number, because the mean of its divisors is an integer number (1118395353).

Almost surely, 2^4450521521 is an apocalyptic number.

It is an amenable number.

4450521521 is a deficient number, since it is larger than the sum of its proper divisors (23059891).

4450521521 is a wasteful number, since it uses less digits than its factorization.

4450521521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23059890.

The product of its (nonzero) digits is 8000, while the sum is 29.

The square root of 4450521521 is about 66712.2291712696. The cubic root of 4450521521 is about 1644.8904095776.

The spelling of 4450521521 in words is "four billion, four hundred fifty million, five hundred twenty-one thousand, five hundred twenty-one".