171517870913 has 8 divisors (see below), whose sum is σ = 171637485096. Its totient is φ = 171398304000.

The previous prime is 171517870883. The next prime is 171517870943. The reversal of 171517870913 is 319078715171.

It is an interprime number because it is at equal distance from previous prime (171517870883) and next prime (171517870943).

It can be written as a sum of positive squares in 4 ways, for example, as 760490929 + 170757379984 = 27577^2 + 413228^2 .

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 171517870913 - 2¹⁰ = 171517869889 is a prime.

It is a super-3 number, since 3×171517870913³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (171517870943) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9909695 + ... + 9926987.

It is an arithmetic number, because the mean of its divisors is an integer number (21454685637).

Almost surely, 2^171517870913 is an apocalyptic number.

It is an amenable number.

171517870913 is a deficient number, since it is larger than the sum of its proper divisors (119614183).

171517870913 is a wasteful number, since it uses less digits than its factorization.

171517870913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23635.

The product of its (nonzero) digits is 370440, while the sum is 50.

The spelling of 171517870913 in words is "one hundred seventy-one billion, five hundred seventeen million, eight hundred seventy thousand, nine hundred thirteen".