7968859809 has 4 divisors (see below), whose sum is σ = 10625146416. Its totient is φ = 5312573204.

The previous prime is 7968859777. The next prime is 7968859849. The reversal of 7968859809 is 9089588697.

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 7968859809 - 2⁵ = 7968859777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7968859849) 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, 1328143299 + ... + 1328143304.

It is an arithmetic number, because the mean of its divisors is an integer number (2656286604).

Almost surely, 2^7968859809 is an apocalyptic number.

It is an amenable number.

7968859809 is a deficient number, since it is larger than the sum of its proper divisors (2656286607).

7968859809 is a wasteful number, since it uses less digits than its factorization.

7968859809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2656286606.

The product of its (nonzero) digits is 78382080, while the sum is 69.

The square root of 7968859809 is about 89268.4704080898. The cubic root of 7968859809 is about 1997.4016097293.

The spelling of 7968859809 in words is "seven billion, nine hundred sixty-eight million, eight hundred fifty-nine thousand, eight hundred nine".