161785114242 has 32 divisors (see below), whose sum is σ = 343197663552. Its totient is φ = 50668130304.

The previous prime is 161785114201. The next prime is 161785114289. The reversal of 161785114242 is 242411587161.

It is a junction number, because it is equal to n+sod(n) for n = 161785114194 and 161785114203.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1315608 + ... + 1433315.

It is an arithmetic number, because the mean of its divisors is an integer number (10724926986).

Almost surely, 2^161785114242 is an apocalyptic number.

161785114242 is an abundant number, since it is smaller than the sum of its proper divisors (181412549310).

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

161785114242 is a wasteful number, since it uses less digits than its factorization.

161785114242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2749522.

The product of its digits is 107520, while the sum is 42.

The spelling of 161785114242 in words is "one hundred sixty-one billion, seven hundred eighty-five million, one hundred fourteen thousand, two hundred forty-two".