171322985385 has 40 divisors (see below), whose sum is σ = 307230259776. Its totient is φ = 91337168160.

The previous prime is 171322985333. The next prime is 171322985399. The reversal of 171322985385 is 583589223171.

171322985385 is a `hidden beast` number, since 1 + 7 + 13 + 2 + 2 + 98 + 538 + 5 = 666.

It is not a de Polignac number, because 171322985385 - 2²² = 171318791081 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 992130 + ... + 1151940.

Almost surely, 2^171322985385 is an apocalyptic number.

171322985385 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

171322985385 is a deficient number, since it is larger than the sum of its proper divisors (135907274391).

171322985385 is a wasteful number, since it uses less digits than its factorization.

171322985385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162475 (or 162466 counting only the distinct ones).

The product of its digits is 3628800, while the sum is 54.

The spelling of 171322985385 in words is "one hundred seventy-one billion, three hundred twenty-two million, nine hundred eighty-five thousand, three hundred eighty-five".