8155681128 has 512 divisors, whose sum is σ = 28200960000. Its totient is φ = 2179457280.

The previous prime is 8155681117. The next prime is 8155681147. The reversal of 8155681128 is 8211865518.

8155681128 is a `hidden beast` number, since 8 + 1 + 556 + 81 + 12 + 8 = 666.

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 127 ways as a sum of consecutive naturals, for example, 121726551 + ... + 121726617.

It is an arithmetic number, because the mean of its divisors is an integer number (55080000).

Almost surely, 2^8155681128 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 8155681128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14100480000).

8155681128 is an abundant number, since it is smaller than the sum of its proper divisors (20045278872).

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

8155681128 is a wasteful number, since it uses less digits than its factorization.

8155681128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187 (or 163 counting only the distinct ones).

The product of its digits is 153600, while the sum is 45.

The square root of 8155681128 is about 90308.8098028094. The cubic root of 8155681128 is about 2012.8901706021.

The spelling of 8155681128 in words is "eight billion, one hundred fifty-five million, six hundred eighty-one thousand, one hundred twenty-eight".