8109619968 has 144 divisors (see below), whose sum is σ = 22056362496. Its totient is φ = 2644561920.

The previous prime is 8109619963. The next prime is 8109619981. The reversal of 8109619968 is 8699169018.

It is not an unprimeable number, because it can be changed into a prime (8109619963) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8901433 + ... + 8902343.

It is an arithmetic number, because the mean of its divisors is an integer number (153169184).

Almost surely, 2^8109619968 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8109619968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11028181248).

8109619968 is an abundant number, since it is smaller than the sum of its proper divisors (13946742528).

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

8109619968 is a wasteful number, since it uses less digits than its factorization.

8109619968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1170 (or 1156 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 57.

The square root of 8109619968 is about 90053.4284078069. The cubic root of 8109619968 is about 2009.0935879971.

The spelling of 8109619968 in words is "eight billion, one hundred nine million, six hundred nineteen thousand, nine hundred sixty-eight".