181820266728048 has 240 divisors, whose sum is σ = 575235607564800. Its totient is φ = 53191884151296.

The previous prime is 181820266727963. The next prime is 181820266728083. The reversal of 181820266728048 is 840827662028181.

181820266728048 is a `hidden beast` number, since 18 + 1 + 82 + 0 + 266 + 7 + 280 + 4 + 8 = 666.

181820266728048 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5452998 + ... + 19833701.

It is an arithmetic number, because the mean of its divisors is an integer number (2396815031520).

Almost surely, 2^{181820266728048} is an apocalyptic number.

181820266728048 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

181820266728048 is an abundant number, since it is smaller than the sum of its proper divisors (393415340836752).

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

181820266728048 is a wasteful number, since it uses less digits than its factorization.

181820266728048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25286916 (or 25286907 counting only the distinct ones).

The product of its (nonzero) digits is 33030144, while the sum is 63.

The spelling of 181820266728048 in words is "one hundred eighty-one trillion, eight hundred twenty billion, two hundred sixty-six million, seven hundred twenty-eight thousand, forty-eight".