7944989568 has 32 divisors (see below), whose sum is σ = 21103879560. Its totient is φ = 2648329728.

The previous prime is 7944989509. The next prime is 7944989587. The reversal of 7944989568 is 8659894497.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 10344655 + ... + 10345422.

Almost surely, 2^7944989568 is an apocalyptic number.

It is an amenable number.

7944989568 is an abundant number, since it is smaller than the sum of its proper divisors (13158889992).

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

7944989568 is a wasteful number, since it uses less digits than its factorization.

7944989568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20690094 (or 20690082 counting only the distinct ones).

The product of its digits is 156764160, while the sum is 69.

The square root of 7944989568 is about 89134.6709647823. The cubic root of 7944989568 is about 1995.4052495511.

The spelling of 7944989568 in words is "seven billion, nine hundred forty-four million, nine hundred eighty-nine thousand, five hundred sixty-eight".