7985968644 has 24 divisors (see below), whose sum is σ = 19444098240. Its totient is φ = 2546250784.

The previous prime is 7985968607. The next prime is 7985968769. The reversal of 7985968644 is 4468695897.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14467059 + ... + 14467610.

It is an arithmetic number, because the mean of its divisors is an integer number (810170760).

Almost surely, 2^7985968644 is an apocalyptic number.

It is an amenable number.

7985968644 is an abundant number, since it is smaller than the sum of its proper divisors (11458129596).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7985968644 is a wasteful number, since it uses less digits than its factorization.

7985968644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28934699 (or 28934697 counting only the distinct ones).

The product of its digits is 104509440, while the sum is 66.

The square root of 7985968644 is about 89364.2470118783. The cubic root of 7985968644 is about 1998.8300360590.

The spelling of 7985968644 in words is "seven billion, nine hundred eighty-five million, nine hundred sixty-eight thousand, six hundred forty-four".