171217057156 has 48 divisors (see below), whose sum is σ = 312035931648. Its totient is φ = 82115827200.

The previous prime is 171217057139. The next prime is 171217057169. The reversal of 171217057156 is 651750712171.

It is a super-2 number, since 2×171217057156² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7088556 + ... + 7112668.

It is an arithmetic number, because the mean of its divisors is an integer number (6500748576).

Almost surely, 2^171217057156 is an apocalyptic number.

It is an amenable number.

171217057156 is a deficient number, since it is larger than the sum of its proper divisors (140818874492).

171217057156 is a wasteful number, since it uses less digits than its factorization.

171217057156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24652 (or 24650 counting only the distinct ones).

The product of its (nonzero) digits is 102900, while the sum is 43.

The spelling of 171217057156 in words is "one hundred seventy-one billion, two hundred seventeen million, fifty-seven thousand, one hundred fifty-six".