171157020686 has 16 divisors (see below), whose sum is σ = 262210362624. Its totient is φ = 83753738424.

The previous prime is 171157020677. The next prime is 171157020701. The reversal of 171157020686 is 686020751171.

It is a super-3 number, since 3×171157020686³ (a number of 35 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3544541 + ... + 3592503.

It is an arithmetic number, because the mean of its divisors is an integer number (16388147664).

Almost surely, 2^171157020686 is an apocalyptic number.

171157020686 is a deficient number, since it is larger than the sum of its proper divisors (91053341938).

171157020686 is a wasteful number, since it uses less digits than its factorization.

171157020686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85975.

The product of its (nonzero) digits is 141120, while the sum is 44.

The spelling of 171157020686 in words is "one hundred seventy-one billion, one hundred fifty-seven million, twenty thousand, six hundred eighty-six".