8172115539 has 16 divisors (see below), whose sum is σ = 12455973120. Its totient is φ = 4668570720.

The previous prime is 8172115507. The next prime is 8172115541. The reversal of 8172115539 is 9355112718.

It is not a de Polignac number, because 8172115539 - 2⁵ = 8172115507 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8172115539.

It is not an unprimeable number, because it can be changed into a prime (8172115559) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 36052 + ... + 132830.

It is an arithmetic number, because the mean of its divisors is an integer number (778498320).

Almost surely, 2^8172115539 is an apocalyptic number.

8172115539 is a deficient number, since it is larger than the sum of its proper divisors (4283857581).

8172115539 is a wasteful number, since it uses less digits than its factorization.

8172115539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100810.

The product of its digits is 75600, while the sum is 42.

The square root of 8172115539 is about 90399.7540870549. The cubic root of 8172115539 is about 2014.2413133839.

The spelling of 8172115539 in words is "eight billion, one hundred seventy-two million, one hundred fifteen thousand, five hundred thirty-nine".