4488843078721 has 3 divisors (see below), whose sum is σ = 4488845197411. Its totient is φ = 4488840960032.

The previous prime is 4488843078703. The next prime is 4488843078799. The reversal of 4488843078721 is 1278703488844.

The square root of 4488843078721 is 2118689.

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.

It can be written as a sum of positive squares in only one way, i.e., 2620154078721 + 1868689000000 = 1618689^2 + 1367000^2 .

It is not a de Polignac number, because 4488843078721 - 2¹⁹ = 4488842554433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4488843078221) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1059345 + ... + 3178033.

Almost surely, 2^{4488843078721} is an apocalyptic number.

4488843078721 is the 2118689-th square number.

4488843078721 is the 1059345-th centered octagonal number.

It is an amenable number.

4488843078721 is a deficient number, since it is larger than the sum of its proper divisors (2118690).

4488843078721 is an frugal number, since it uses more digits than its factorization.

4488843078721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4237378 (or 2118689 counting only the distinct ones).

The product of its (nonzero) digits is 77070336, while the sum is 64.

Multiplying 4488843078721 by its sum of digits (64), we get a square (287285957038144 = 16949512²).

The spelling of 4488843078721 in words is "four trillion, four hundred eighty-eight billion, eight hundred forty-three million, seventy-eight thousand, seven hundred twenty-one".