8117781328 has 20 divisors (see below), whose sum is σ = 15730028928. Its totient is φ = 4058419040.

The previous prime is 8117781313. The next prime is 8117781341. The reversal of 8117781328 is 8231877118.

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, 143163 + ... + 191653.

Almost surely, 2^8117781328 is an apocalyptic number.

It is an amenable number.

8117781328 is a deficient number, since it is larger than the sum of its proper divisors (7612247600).

8117781328 is a wasteful number, since it uses less digits than its factorization.

8117781328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58962 (or 58956 counting only the distinct ones).

The product of its digits is 150528, while the sum is 46.

The square root of 8117781328 is about 90098.7310010524. The cubic root of 8117781328 is about 2009.7673326225.

The spelling of 8117781328 in words is "eight billion, one hundred seventeen million, seven hundred eighty-one thousand, three hundred twenty-eight".