7985208849 has 4 divisors (see below), whose sum is σ = 10646945136. Its totient is φ = 5323472564.

The previous prime is 7985208823. The next prime is 7985208851. The reversal of 7985208849 is 9488025897.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 7985208849 - 2¹⁷ = 7985077777 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 7985208792 and 7985208801.

It is not an unprimeable number, because it can be changed into a prime (7985208809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1330868139 + ... + 1330868144.

It is an arithmetic number, because the mean of its divisors is an integer number (2661736284).

Almost surely, 2^7985208849 is an apocalyptic number.

It is an amenable number.

7985208849 is a deficient number, since it is larger than the sum of its proper divisors (2661736287).

7985208849 is a wasteful number, since it uses less digits than its factorization.

7985208849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2661736286.

The product of its (nonzero) digits is 11612160, while the sum is 60.

The square root of 7985208849 is about 89359.9957978961. The cubic root of 7985208849 is about 1998.7666436557.

The spelling of 7985208849 in words is "seven billion, nine hundred eighty-five million, two hundred eight thousand, eight hundred forty-nine".