172006165606 has 32 divisors (see below), whose sum is σ = 284161633920. Its totient is φ = 77435798400.

The previous prime is 172006165547. The next prime is 172006165613. The reversal of 172006165606 is 606561600271.

It is a super-2 number, since 2×172006165606² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 19696261 + ... + 19704991.

It is an arithmetic number, because the mean of its divisors is an integer number (8880051060).

Almost surely, 2^172006165606 is an apocalyptic number.

172006165606 is a deficient number, since it is larger than the sum of its proper divisors (112155468314).

172006165606 is a wasteful number, since it uses less digits than its factorization.

172006165606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17220.

The product of its (nonzero) digits is 90720, while the sum is 40.

Adding to 172006165606 its reverse (606561600271), we get a palindrome (778567765877).

The spelling of 172006165606 in words is "one hundred seventy-two billion, six million, one hundred sixty-five thousand, six hundred six".