181845871107 has 4 divisors (see below), whose sum is σ = 242461161480. Its totient is φ = 121230580736.

The previous prime is 181845871087. The next prime is 181845871111. The reversal of 181845871107 is 701178548181.

181845871107 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 181845871107 - 2¹² = 181845867011 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 181845871107.

It is not an unprimeable number, because it can be changed into a prime (181845871117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30307645182 + ... + 30307645187.

It is an arithmetic number, because the mean of its divisors is an integer number (60615290370).

Almost surely, 2^181845871107 is an apocalyptic number.

181845871107 is a deficient number, since it is larger than the sum of its proper divisors (60615290373).

181845871107 is an equidigital number, since it uses as much as digits as its factorization.

181845871107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60615290372.

The product of its (nonzero) digits is 501760, while the sum is 51.

The spelling of 181845871107 in words is "one hundred eighty-one billion, eight hundred forty-five million, eight hundred seventy-one thousand, one hundred seven".