171031620864 has 288 divisors, whose sum is σ = 517239923200. Its totient is φ = 49736540160.

The previous prime is 171031620857. The next prime is 171031620889. The reversal of 171031620864 is 468026130171.

It is a Harshad number since it is a multiple of its sum of digits (39).

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 31 ways as a sum of consecutive naturals, for example, 108315627 + ... + 108317205.

Almost surely, 2^171031620864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 171031620864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (258619961600).

171031620864 is an abundant number, since it is smaller than the sum of its proper divisors (346208302336).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

171031620864 is a wasteful number, since it uses less digits than its factorization.

171031620864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2201 (or 2187 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 39.

The spelling of 171031620864 in words is "one hundred seventy-one billion, thirty-one million, six hundred twenty thousand, eight hundred sixty-four".