7850449985 has 24 divisors (see below), whose sum is σ = 11031212736. Its totient is φ = 5347490400.

The previous prime is 7850449979. The next prime is 7850449987. The reversal of 7850449985 is 5899440587.

It is not a de Polignac number, because 7850449985 - 2²⁰ = 7849401409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7850449987) 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 23 ways as a sum of consecutive naturals, for example, 69107 + ... + 143096.

It is an arithmetic number, because the mean of its divisors is an integer number (459633864).

Almost surely, 2^7850449985 is an apocalyptic number.

It is an amenable number.

7850449985 is a deficient number, since it is larger than the sum of its proper divisors (3180762751).

7850449985 is a wasteful number, since it uses less digits than its factorization.

7850449985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212373 (or 212366 counting only the distinct ones).

The product of its (nonzero) digits is 14515200, while the sum is 59.

The square root of 7850449985 is about 88602.7651092222. The cubic root of 7850449985 is about 1987.4590250904.

The spelling of 7850449985 in words is "seven billion, eight hundred fifty million, four hundred forty-nine thousand, nine hundred eighty-five".