8484447985 has 32 divisors (see below), whose sum is σ = 11277195552. Its totient is φ = 6087260160.

The previous prime is 8484447953. The next prime is 8484447991. The reversal of 8484447985 is 5897444848.

It can be written as a sum of positive squares in 16 ways, for example, as 2178182241 + 6306265744 = 46671^2 + 79412^2 .

It is not a de Polignac number, because 8484447985 - 2⁵ = 8484447953 is a prime.

It is a super-2 number, since 2×8484447985² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1972357 + ... + 1976653.

It is an arithmetic number, because the mean of its divisors is an integer number (352412361).

Almost surely, 2^8484447985 is an apocalyptic number.

It is an amenable number.

8484447985 is a deficient number, since it is larger than the sum of its proper divisors (2792747567).

8484447985 is a wasteful number, since it uses less digits than its factorization.

8484447985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5173.

The product of its digits is 41287680, while the sum is 61.

The square root of 8484447985 is about 92111.0633148918. The cubic root of 8484447985 is about 2039.5821251764.

The spelling of 8484447985 in words is "eight billion, four hundred eighty-four million, four hundred forty-seven thousand, nine hundred eighty-five".