172168583387685 has 16 divisors (see below), whose sum is σ = 275470860993216. Its totient is φ = 91822868615808.

The previous prime is 172168583387663. The next prime is 172168583387699. The reversal of 172168583387685 is 586783385861271.

It is not a de Polignac number, because 172168583387685 - 2¹³ = 172168583379493 is a prime.

It is a super-2 number, since 2×172168583387685² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 172168583387685.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19684504 + ... + 27052113.

It is an arithmetic number, because the mean of its divisors is an integer number (17216928812076).

Almost surely, 2^{172168583387685} is an apocalyptic number.

172168583387685 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

172168583387685 is a deficient number, since it is larger than the sum of its proper divisors (103302277605531).

172168583387685 is a wasteful number, since it uses less digits than its factorization.

172168583387685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46982212.

The product of its digits is 3251404800, while the sum is 78.

The spelling of 172168583387685 in words is "one hundred seventy-two trillion, one hundred sixty-eight billion, five hundred eighty-three million, three hundred eighty-seven thousand, six hundred eighty-five".