181338623085852 has 24 divisors (see below), whose sum is σ = 470137170963600. Its totient is φ = 60446207695248.

The previous prime is 181338623085821. The next prime is 181338623085887. The reversal of 181338623085852 is 258580326833181.

It is a happy number.

181338623085852 is a `hidden beast` number, since 1 + 8 + 13 + 3 + 8 + 6 + 2 + 30 + 8 + 585 + 2 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 181338623085852.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 839530662327 + ... + 839530662542.

It is an arithmetic number, because the mean of its divisors is an integer number (19589048790150).

Almost surely, 2^{181338623085852} is an apocalyptic number.

181338623085852 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

181338623085852 is an abundant number, since it is smaller than the sum of its proper divisors (288798547877748).

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

181338623085852 is a wasteful number, since it uses less digits than its factorization.

181338623085852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1679061324882 (or 1679061324874 counting only the distinct ones).

The product of its (nonzero) digits is 66355200, while the sum is 63.

The spelling of 181338623085852 in words is "one hundred eighty-one trillion, three hundred thirty-eight billion, six hundred twenty-three million, eighty-five thousand, eight hundred fifty-two".