181875189794868 has 36 divisors (see below), whose sum is σ = 464036699206080. Its totient is φ = 60058473887376.

The previous prime is 181875189794863. The next prime is 181875189794911. The reversal of 181875189794868 is 868497981578181.

181875189794868 is a `hidden beast` number, since 1 + 8 + 1 + 8 + 7 + 51 + 8 + 9 + 79 + 486 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181875189794861) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23607886828 + ... + 23607894531.

It is an arithmetic number, because the mean of its divisors is an integer number (12889908311280).

Almost surely, 2^{181875189794868} is an apocalyptic number.

181875189794868 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

181875189794868 is an abundant number, since it is smaller than the sum of its proper divisors (282161509411212).

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

181875189794868 is a wasteful number, since it uses less digits than its factorization.

181875189794868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47215781476 (or 47215781471 counting only the distinct ones).

The product of its digits is 15606743040, while the sum is 90.

The spelling of 181875189794868 in words is "one hundred eighty-one trillion, eight hundred seventy-five billion, one hundred eighty-nine million, seven hundred ninety-four thousand, eight hundred sixty-eight".