181389625943242 has 48 divisors (see below), whose sum is σ = 288379580590080. Its totient is φ = 85465358014400.

The previous prime is 181389625943191. The next prime is 181389625943243. The reversal of 181389625943242 is 242349526983181.

It is not an unprimeable number, because it can be changed into a prime (181389625943243) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28203567 + ... + 34032637.

It is an arithmetic number, because the mean of its divisors is an integer number (6007907928960).

Almost surely, 2^{181389625943242} is an apocalyptic number.

181389625943242 is a deficient number, since it is larger than the sum of its proper divisors (106989954646838).

181389625943242 is a wasteful number, since it uses less digits than its factorization.

181389625943242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5829399 (or 5829346 counting only the distinct ones).

The product of its digits is 179159040, while the sum is 67.

The spelling of 181389625943242 in words is "one hundred eighty-one trillion, three hundred eighty-nine billion, six hundred twenty-five million, nine hundred forty-three thousand, two hundred forty-two".