8557517947165 has 16 divisors (see below), whose sum is σ = 11205054866880. Its totient is φ = 6222268350720.

The previous prime is 8557517947163. The next prime is 8557517947219. The reversal of 8557517947165 is 5617497157558.

It is a happy number.

It is not a de Polignac number, because 8557517947165 - 2¹ = 8557517947163 is a prime.

It is a super-2 number, since 2×8557517947165² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 8557517947094 and 8557517947103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8557517947163) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17013180 + ... + 17508949.

It is an arithmetic number, because the mean of its divisors is an integer number (700315929180).

Almost surely, 2^{8557517947165} is an apocalyptic number.

It is an amenable number.

8557517947165 is a deficient number, since it is larger than the sum of its proper divisors (2647536919715).

8557517947165 is a wasteful number, since it uses less digits than its factorization.

8557517947165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34526652.

The product of its digits is 370440000, while the sum is 70.

The spelling of 8557517947165 in words is "eight trillion, five hundred fifty-seven billion, five hundred seventeen million, nine hundred forty-seven thousand, one hundred sixty-five".