181382521240 has 64 divisors (see below), whose sum is σ = 411041174400. Its totient is φ = 72033203712.

The previous prime is 181382521217. The next prime is 181382521289. The reversal of 181382521240 is 42125283181.

It is a happy number.

181382521240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×181382521240² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 181382521240.

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 15 ways as a sum of consecutive naturals, for example, 5054481 + ... + 5090239.

It is an arithmetic number, because the mean of its divisors is an integer number (6422518350).

Almost surely, 2^181382521240 is an apocalyptic number.

181382521240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

181382521240 is an abundant number, since it is smaller than the sum of its proper divisors (229658653160).

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

181382521240 is a wasteful number, since it uses less digits than its factorization.

181382521240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36676 (or 36672 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 37.

The spelling of 181382521240 in words is "one hundred eighty-one billion, three hundred eighty-two million, five hundred twenty-one thousand, two hundred forty".