181560273037920 has 1344 divisors, whose sum is σ = 740539715134464. Its totient is φ = 41186647756800.

The previous prime is 181560273037903. The next prime is 181560273037961. The reversal of 181560273037920 is 29730372065181.

181560273037920 is a `hidden beast` number, since 1 + 8 + 1 + 5 + 602 + 7 + 3 + 0 + 3 + 7 + 9 + 20 = 666.

181560273037920 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

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 223 ways as a sum of consecutive naturals, for example, 148454842429 + ... + 148454843651.

It is an arithmetic number, because the mean of its divisors is an integer number (550996811856).

Almost surely, 2^{181560273037920} is an apocalyptic number.

181560273037920 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 181560273037920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (370269857567232).

181560273037920 is an abundant number, since it is smaller than the sum of its proper divisors (558979442096544).

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

181560273037920 is a wasteful number, since it uses less digits than its factorization.

181560273037920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2487 (or 2464 counting only the distinct ones).

The product of its (nonzero) digits is 3810240, while the sum is 54.

The spelling of 181560273037920 in words is "one hundred eighty-one trillion, five hundred sixty billion, two hundred seventy-three million, thirty-seven thousand, nine hundred twenty".