448684247531521 has 4 divisors (see below), whose sum is σ = 449230756969044. Its totient is φ = 448137738094000.

The previous prime is 448684247531519. The next prime is 448684247531659. The reversal of 448684247531521 is 125135742486844.

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 40388071335921 + 408296176195600 = 6355161^2 + 20206340^2 .

It is a cyclic number.

It is not a de Polignac number, because 448684247531521 - 2¹ = 448684247531519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (448684247531321) 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, 273254717530 + ... + 273254719171.

It is an arithmetic number, because the mean of its divisors is an integer number (112307689242261).

Almost surely, 2^{448684247531521} is an apocalyptic number.

It is an amenable number.

448684247531521 is a deficient number, since it is larger than the sum of its proper divisors (546509437523).

448684247531521 is an equidigital number, since it uses as much as digits as its factorization.

448684247531521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 546509437522.

The product of its digits is 206438400, while the sum is 64.

The spelling of 448684247531521 in words is "four hundred forty-eight trillion, six hundred eighty-four billion, two hundred forty-seven million, five hundred thirty-one thousand, five hundred twenty-one".