171907851090 has 64 divisors (see below), whose sum is σ = 415446716160. Its totient is φ = 45523641600.

The previous prime is 171907851047. The next prime is 171907851109. The reversal of 171907851090 is 90158709171.

It is a super-2 number, since 2×171907851090² (a number of 23 digits) contains 22 as substring.

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 31 ways as a sum of consecutive naturals, for example, 25169796 + ... + 25176624.

It is an arithmetic number, because the mean of its divisors is an integer number (6491354940).

Almost surely, 2^171907851090 is an apocalyptic number.

171907851090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

171907851090 is an abundant number, since it is smaller than the sum of its proper divisors (243538865070).

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

171907851090 is a wasteful number, since it uses less digits than its factorization.

171907851090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12547.

The product of its (nonzero) digits is 158760, while the sum is 48.

The spelling of 171907851090 in words is "one hundred seventy-one billion, nine hundred seven million, eight hundred fifty-one thousand, ninety".