161838581810334 has 64 divisors (see below), whose sum is σ = 381478982185728. Its totient is φ = 45124902201600.

The previous prime is 161838581810317. The next prime is 161838581810359. The reversal of 161838581810334 is 433018185838161.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 301046232 + ... + 301583339.

It is an arithmetic number, because the mean of its divisors is an integer number (5960609096652).

Almost surely, 2^{161838581810334} is an apocalyptic number.

161838581810334 is an abundant number, since it is smaller than the sum of its proper divisors (219640400375394).

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

161838581810334 is a wasteful number, since it uses less digits than its factorization.

161838581810334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 602629913.

The product of its (nonzero) digits is 13271040, while the sum is 60.

The spelling of 161838581810334 in words is "one hundred sixty-one trillion, eight hundred thirty-eight billion, five hundred eighty-one million, eight hundred ten thousand, three hundred thirty-four".