171238123870 has 32 divisors (see below), whose sum is σ = 336270320640. Its totient is φ = 62264535840.

The previous prime is 171238123867. The next prime is 171238123873. The reversal of 171238123870 is 78321832171.

It is an interprime number because it is at equal distance from previous prime (171238123867) and next prime (171238123873).

It is a super-3 number, since 3×171238123870³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171238123873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2201259 + ... + 2277721.

It is an arithmetic number, because the mean of its divisors is an integer number (10508447520).

Almost surely, 2^171238123870 is an apocalyptic number.

171238123870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

171238123870 is a deficient number, since it is larger than the sum of its proper divisors (165032196770).

171238123870 is a wasteful number, since it uses less digits than its factorization.

171238123870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96840.

The product of its (nonzero) digits is 112896, while the sum is 43.

The spelling of 171238123870 in words is "one hundred seventy-one billion, two hundred thirty-eight million, one hundred twenty-three thousand, eight hundred seventy".