8165128050 has 168 divisors, whose sum is σ = 24111549396. Its totient is φ = 2049131520.

The previous prime is 8165128043. The next prime is 8165128051. The reversal of 8165128050 is 508215618.

8165128050 is a `hidden beast` number, since 8 + 16 + 512 + 80 + 50 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 4729175361 + 3435952689 = 68769^2 + 58617^2 .

It is a junction number, because it is equal to n+sod(n) for n = 8165127996 and 8165128014.

It is not an unprimeable number, because it can be changed into a prime (8165128051) by changing a digit.

It is a polite number, since it can be written in 83 ways as a sum of consecutive naturals, for example, 613062 + ... + 626238.

Almost surely, 2^8165128050 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8165128050, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12055774698).

8165128050 is an abundant number, since it is smaller than the sum of its proper divisors (15946421346).

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

8165128050 is a wasteful number, since it uses less digits than its factorization.

8165128050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13224 (or 13204 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 36.

The square root of 8165128050 is about 90361.0981008974. The cubic root of 8165128050 is about 2013.6670637795.

The spelling of 8165128050 in words is "eight billion, one hundred sixty-five million, one hundred twenty-eight thousand, fifty".