171428020396997 has 32 divisors (see below), whose sum is σ = 211882496136192. Its totient is φ = 135060902313984.

The previous prime is 171428020396987. The next prime is 171428020396999. The reversal of 171428020396997 is 799693020824171.

171428020396997 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 171428020396997 - 2²⁴ = 171428003619781 is a prime.

It is a Smith number, since the sum of its digits (68) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171428020396999) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 66487028 + ... + 69017250.

It is an arithmetic number, because the mean of its divisors is an integer number (6621328004256).

Almost surely, 2^{171428020396997} is an apocalyptic number.

It is an amenable number.

171428020396997 is a deficient number, since it is larger than the sum of its proper divisors (40454475739195).

171428020396997 is a wasteful number, since it uses less digits than its factorization.

171428020396997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2533397.

The product of its (nonzero) digits is 82301184, while the sum is 68.

The spelling of 171428020396997 in words is "one hundred seventy-one trillion, four hundred twenty-eight billion, twenty million, three hundred ninety-six thousand, nine hundred ninety-seven".