181840171742 has 16 divisors (see below), whose sum is σ = 277392958512. Its totient is φ = 89377585920.

The previous prime is 181840171727. The next prime is 181840171753. The reversal of 181840171742 is 247171048181.

181840171742 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 181840171693 and 181840171702.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 222323 + ... + 642734.

It is an arithmetic number, because the mean of its divisors is an integer number (17337059907).

Almost surely, 2^181840171742 is an apocalyptic number.

181840171742 is a deficient number, since it is larger than the sum of its proper divisors (95552786770).

181840171742 is a wasteful number, since it uses less digits than its factorization.

181840171742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 866843.

The product of its (nonzero) digits is 100352, while the sum is 44.

The spelling of 181840171742 in words is "one hundred eighty-one billion, eight hundred forty million, one hundred seventy-one thousand, seven hundred forty-two".