181740031872 has 256 divisors, whose sum is σ = 559820782080. Its totient is φ = 51167232000.

The previous prime is 181740031829. The next prime is 181740031927. The reversal of 181740031872 is 278130047181.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 65443348 + ... + 65446124.

It is an arithmetic number, because the mean of its divisors is an integer number (2186799930).

Almost surely, 2^181740031872 is an apocalyptic number.

181740031872 is a gapful number since it is divisible by the number (12) 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 181740031872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (279910391040).

181740031872 is an abundant number, since it is smaller than the sum of its proper divisors (378080750208).

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

181740031872 is a wasteful number, since it uses less digits than its factorization.

181740031872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3149 (or 3137 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 42.

The spelling of 181740031872 in words is "one hundred eighty-one billion, seven hundred forty million, thirty-one thousand, eight hundred seventy-two".