7985957864 has 32 divisors (see below), whose sum is σ = 15469574400. Its totient is φ = 3860952960.

The previous prime is 7985957851. The next prime is 7985957873. The reversal of 7985957864 is 4687595897.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 7985957794 and 7985957803.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 299444 + ... + 325020.

It is an arithmetic number, because the mean of its divisors is an integer number (483424200).

Almost surely, 2^7985957864 is an apocalyptic number.

It is an amenable number.

7985957864 is a deficient number, since it is larger than the sum of its proper divisors (7483616536).

7985957864 is a wasteful number, since it uses less digits than its factorization.

7985957864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26873 (or 26869 counting only the distinct ones).

The product of its digits is 152409600, while the sum is 68.

The square root of 7985957864 is about 89364.1866969090. The cubic root of 7985957864 is about 1998.8291366733.

The spelling of 7985957864 in words is "seven billion, nine hundred eighty-five million, nine hundred fifty-seven thousand, eight hundred sixty-four".