171085289085 has 12 divisors (see below), whose sum is σ = 296547834492. Its totient is φ = 91245487488.

The previous prime is 171085289057. The next prime is 171085289093. The reversal of 171085289085 is 580982580171.

171085289085 is a `hidden beast` number, since 1 + 7 + 108 + 528 + 9 + 0 + 8 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 34964138169 + 136121150916 = 186987^2 + 368946^2 .

It is not a de Polignac number, because 171085289085 - 2¹⁸ = 171085026941 is a prime.

It is a super-2 number, since 2×171085289085² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1900947612 + ... + 1900947701.

It is an arithmetic number, because the mean of its divisors is an integer number (24712319541).

Almost surely, 2^171085289085 is an apocalyptic number.

171085289085 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

171085289085 is a deficient number, since it is larger than the sum of its proper divisors (125462545407).

171085289085 is a wasteful number, since it uses less digits than its factorization.

171085289085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3801895324 (or 3801895321 counting only the distinct ones).

The product of its (nonzero) digits is 1612800, while the sum is 54.

The spelling of 171085289085 in words is "one hundred seventy-one billion, eighty-five million, two hundred eighty-nine thousand, eighty-five".