168172026566855 has 16 divisors (see below), whose sum is σ = 205749106875360. Its totient is φ = 131912504750208.

The previous prime is 168172026566839. The next prime is 168172026566891. The reversal of 168172026566855 is 558665620271861.

It is a cyclic number.

It is not a de Polignac number, because 168172026566855 - 2⁴ = 168172026566839 is a prime.

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, 207938960 + ... + 208746149.

It is an arithmetic number, because the mean of its divisors is an integer number (12859319179710).

Almost surely, 2^{168172026566855} is an apocalyptic number.

168172026566855 is a deficient number, since it is larger than the sum of its proper divisors (37577080308505).

168172026566855 is a wasteful number, since it uses less digits than its factorization.

168172026566855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416686690.

The product of its (nonzero) digits is 290304000, while the sum is 68.

The spelling of 168172026566855 in words is "one hundred sixty-eight trillion, one hundred seventy-two billion, twenty-six million, five hundred sixty-six thousand, eight hundred fifty-five".