181883220272 has 20 divisors (see below), whose sum is σ = 379506335040. Its totient is φ = 83946101568.

The previous prime is 181883220247. The next prime is 181883220283. The reversal of 181883220272 is 272022388181.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 437219072 + ... + 437219487.

It is an arithmetic number, because the mean of its divisors is an integer number (18975316752).

Almost surely, 2^181883220272 is an apocalyptic number.

It is an amenable number.

181883220272 is an abundant number, since it is smaller than the sum of its proper divisors (197623114768).

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

181883220272 is a wasteful number, since it uses less digits than its factorization.

181883220272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 874438580 (or 874438574 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 44.

The spelling of 181883220272 in words is "one hundred eighty-one billion, eight hundred eighty-three million, two hundred twenty thousand, two hundred seventy-two".