8172124165 has 8 divisors (see below), whose sum is σ = 10144706040. Its totient is φ = 6312261312.

The previous prime is 8172124151. The next prime is 8172124193. The reversal of 8172124165 is 5614212718.

It can be written as a sum of positive squares in 4 ways, for example, as 306740196 + 7865383969 = 17514^2 + 88687^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8172124165 - 2¹¹ = 8172122117 is a prime.

It is a super-2 number, since 2×8172124165² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28179594 + ... + 28179883.

It is an arithmetic number, because the mean of its divisors is an integer number (1268088255).

Almost surely, 2^8172124165 is an apocalyptic number.

It is an amenable number.

8172124165 is a deficient number, since it is larger than the sum of its proper divisors (1972581875).

8172124165 is a wasteful number, since it uses less digits than its factorization.

8172124165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56359511.

The product of its digits is 26880, while the sum is 37.

The square root of 8172124165 is about 90399.8017973491. The cubic root of 8172124165 is about 2014.2420220881.

The spelling of 8172124165 in words is "eight billion, one hundred seventy-two million, one hundred twenty-four thousand, one hundred sixty-five".