181671089112 has 40 divisors (see below), whose sum is σ = 508847265300. Its totient is φ = 60557029488.

The previous prime is 181671089099. The next prime is 181671089113. The reversal of 181671089112 is 211980176181.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181671089113) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 140177662 + ... + 140178957.

Almost surely, 2^181671089112 is an apocalyptic number.

181671089112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

181671089112 is an abundant number, since it is smaller than the sum of its proper divisors (327176176188).

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

181671089112 is a wasteful number, since it uses less digits than its factorization.

181671089112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280356637 (or 280356624 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 45.

The spelling of 181671089112 in words is "one hundred eighty-one billion, six hundred seventy-one million, eighty-nine thousand, one hundred twelve".