161000384231680 has 144 divisors (see below), whose sum is σ = 441017010491904. Its totient is φ = 55165256294400.

The previous prime is 161000384231641. The next prime is 161000384231689. The reversal of 161000384231680 is 86132483000161.

It is a super-2 number, since 2×161000384231680² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161000384231689) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 8508130 + ... + 19859230.

It is an arithmetic number, because the mean of its divisors is an integer number (3062618128416).

Almost surely, 2^{161000384231680} is an apocalyptic number.

161000384231680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161000384231680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (220508505245952).

161000384231680 is an abundant number, since it is smaller than the sum of its proper divisors (280016626260224).

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

161000384231680 is a wasteful number, since it uses less digits than its factorization.

161000384231680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11352712 (or 11352698 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 43.

The spelling of 161000384231680 in words is "one hundred sixty-one trillion, three hundred eighty-four million, two hundred thirty-one thousand, six hundred eighty".