171870216902 has 16 divisors (see below), whose sum is σ = 258242402880. Its totient is φ = 85789463592.

The previous prime is 171870216877. The next prime is 171870216943. The reversal of 171870216902 is 209612078171.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12702713 + ... + 12716235.

It is an arithmetic number, because the mean of its divisors is an integer number (16140150180).

Almost surely, 2^171870216902 is an apocalyptic number.

171870216902 is a deficient number, since it is larger than the sum of its proper divisors (86372185978).

171870216902 is a wasteful number, since it uses less digits than its factorization.

171870216902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23827.

The product of its (nonzero) digits is 84672, while the sum is 44.

The spelling of 171870216902 in words is "one hundred seventy-one billion, eight hundred seventy million, two hundred sixteen thousand, nine hundred two".