170533872217 has 8 divisors (see below), whose sum is σ = 174758217480. Its totient is φ = 166312621440.

The previous prime is 170533872149. The next prime is 170533872239. The reversal of 170533872217 is 712278335071.

170533872217 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 312440976 + 170221431241 = 17676^2 + 412579^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 170533872217 - 2²⁷ = 170399654489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (170533872277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 661842 + ... + 882667.

It is an arithmetic number, because the mean of its divisors is an integer number (21844777185).

Almost surely, 2^170533872217 is an apocalyptic number.

It is an amenable number.

170533872217 is a deficient number, since it is larger than the sum of its proper divisors (4224345263).

170533872217 is a wasteful number, since it uses less digits than its factorization.

170533872217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1547243.

The product of its (nonzero) digits is 493920, while the sum is 46.

It can be divided in two parts, 1705338 and 72217, that added together give a triangular number (1777555 = T₁₈₈₅).

The spelling of 170533872217 in words is "one hundred seventy billion, five hundred thirty-three million, eight hundred seventy-two thousand, two hundred seventeen".