8145515136 has 128 divisors (see below), whose sum is σ = 24630013440. Its totient is φ = 2360990720.

The previous prime is 8145515089. The next prime is 8145515233. The reversal of 8145515136 is 6315155418.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

It is a junction number, because it is equal to n+sod(n) for n = 8145515094 and 8145515103.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55231 + ... + 139073.

It is an arithmetic number, because the mean of its divisors is an integer number (192421980).

Almost surely, 2^8145515136 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 8145515136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12315006720).

8145515136 is an abundant number, since it is smaller than the sum of its proper divisors (16484498304).

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

8145515136 is a wasteful number, since it uses less digits than its factorization.

8145515136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83894 (or 83882 counting only the distinct ones).

The product of its digits is 72000, while the sum is 39.

The square root of 8145515136 is about 90252.5076438323. The cubic root of 8145515136 is about 2012.0534723025.

The spelling of 8145515136 in words is "eight billion, one hundred forty-five million, five hundred fifteen thousand, one hundred thirty-six".