161323316000 has 192 divisors, whose sum is σ = 494178257664. Its totient is φ = 50282496000.

The previous prime is 161323315963. The next prime is 161323316009. The reversal of 161323316000 is 613323161.

161323316000 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (161323316009) 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 31 ways as a sum of consecutive naturals, for example, 46112 + ... + 569888.

It is an arithmetic number, because the mean of its divisors is an integer number (2573845092).

Almost surely, 2^161323316000 is an apocalyptic number.

161323316000 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 161323316000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (247089128832).

161323316000 is an abundant number, since it is smaller than the sum of its proper divisors (332854941664).

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

161323316000 is a wasteful number, since it uses less digits than its factorization.

161323316000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 523820 (or 523802 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 26.

Adding to 161323316000 its reverse (613323161), we get a palindrome (161936639161).

The spelling of 161323316000 in words is "one hundred sixty-one billion, three hundred twenty-three million, three hundred sixteen thousand".