4518995878849 has 3 divisors (see below), whose sum is σ = 4518998004643. Its totient is φ = 4518993753056.

The previous prime is 4518995878843. The next prime is 4518995878853. The reversal of 4518995878849 is 9488785998154.

The square root of 4518995878849 is 2125793.

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., 120613817025 + 4398382061824 = 347295^2 + 2097232^2 .

It is not a de Polignac number, because 4518995878849 - 2⁷ = 4518995878721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4518995878843) 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, 1062897 + ... + 3188689.

Almost surely, 2^{4518995878849} is an apocalyptic number.

4518995878849 is the 2125793-rd square number.

4518995878849 is the 1062897-th centered octagonal number.

It is an amenable number.

4518995878849 is a deficient number, since it is larger than the sum of its proper divisors (2125794).

4518995878849 is an frugal number, since it uses more digits than its factorization.

4518995878849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4251586 (or 2125793 counting only the distinct ones).

The product of its digits is 8360755200, while the sum is 85.

The spelling of 4518995878849 in words is "four trillion, five hundred eighteen billion, nine hundred ninety-five million, eight hundred seventy-eight thousand, eight hundred forty-nine".