161838618133 has 8 divisors (see below), whose sum is σ = 170375087520. Its totient is φ = 153304013520.

The previous prime is 161838618131. The next prime is 161838618167. The reversal of 161838618133 is 331816838161.

161838618133 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 161838618133 - 2¹ = 161838618131 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161838618131) 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 7 ways as a sum of consecutive naturals, for example, 286258 + ... + 636883.

It is an arithmetic number, because the mean of its divisors is an integer number (21296885940).

Almost surely, 2^161838618133 is an apocalyptic number.

It is an amenable number.

161838618133 is a deficient number, since it is larger than the sum of its proper divisors (8536469387).

161838618133 is an equidigital number, since it uses as much as digits as its factorization.

161838618133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 932387.

The product of its digits is 497664, while the sum is 49.

The spelling of 161838618133 in words is "one hundred sixty-one billion, eight hundred thirty-eight million, six hundred eighteen thousand, one hundred thirty-three".