187681221080 has 128 divisors (see below), whose sum is σ = 440514961920. Its totient is φ = 71910236160.

The previous prime is 187681220959. The next prime is 187681221083. The reversal of 187681221080 is 80122186781.

187681221080 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (187681221083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23565179 + ... + 23573141.

It is an arithmetic number, because the mean of its divisors is an integer number (3441523140).

Almost surely, 2^187681221080 is an apocalyptic number.

187681221080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 187681221080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (220257480960).

187681221080 is an abundant number, since it is smaller than the sum of its proper divisors (252833740840).

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

187681221080 is a wasteful number, since it uses less digits than its factorization.

187681221080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8281 (or 8277 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 44.

The spelling of 187681221080 in words is "one hundred eighty-seven billion, six hundred eighty-one million, two hundred twenty-one thousand, eighty".