8191120608 has 144 divisors (see below), whose sum is σ = 26906036976. Its totient is φ = 2336133120.

The previous prime is 8191120579. The next prime is 8191120621. The reversal of 8191120608 is 8060211918.

8191120608 is a `hidden beast` number, since 8 + 19 + 11 + 20 + 608 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22191 + ... + 129902.

It is an arithmetic number, because the mean of its divisors is an integer number (186847479).

Almost surely, 2^8191120608 is an apocalyptic number.

8191120608 is a gapful number since it is divisible by the number (88) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8191120608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13453018488).

8191120608 is an abundant number, since it is smaller than the sum of its proper divisors (18714916368).

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

8191120608 is a wasteful number, since it uses less digits than its factorization.

8191120608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152137 (or 152126 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 36.

The square root of 8191120608 is about 90504.8098611339. The cubic root of 8191120608 is about 2015.8015441456.

The spelling of 8191120608 in words is "eight billion, one hundred ninety-one million, one hundred twenty thousand, six hundred eight".