161103343320 has 192 divisors, whose sum is σ = 527379128640. Its totient is φ = 42650496000.

The previous prime is 161103343309. The next prime is 161103343321. The reversal of 161103343320 is 23343301161.

161103343320 is a `hidden beast` number, since 1 + 6 + 1 + 1 + 0 + 334 + 3 + 320 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161103343321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 45675397 + ... + 45678923.

It is an arithmetic number, because the mean of its divisors is an integer number (2746766295).

Almost surely, 2^161103343320 is an apocalyptic number.

161103343320 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 161103343320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (263689564320).

161103343320 is an abundant number, since it is smaller than the sum of its proper divisors (366275785320).

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

161103343320 is a wasteful number, since it uses less digits than its factorization.

161103343320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4426 (or 4419 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

Adding to 161103343320 its reverse (23343301161), we get a palindrome (184446644481).

The spelling of 161103343320 in words is "one hundred sixty-one billion, one hundred three million, three hundred forty-three thousand, three hundred twenty".