161718248448 has 264 divisors, whose sum is σ = 496165288320. Its totient is φ = 50556764160.

The previous prime is 161718248441. The next prime is 161718248453. The reversal of 161718248448 is 844842817161.

161718248448 is a `hidden beast` number, since 1 + 6 + 17 + 182 + 4 + 8 + 448 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 161718248394 and 161718248403.

It is not an unprimeable number, because it can be changed into a prime (161718248441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 48723333 + ... + 48726651.

Almost surely, 2^161718248448 is an apocalyptic number.

161718248448 is a gapful number since it is divisible by the number (18) 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 161718248448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (248082644160).

161718248448 is an abundant number, since it is smaller than the sum of its proper divisors (334447039872).

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

161718248448 is a wasteful number, since it uses less digits than its factorization.

161718248448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3673 (or 3652 counting only the distinct ones).

The product of its digits is 2752512, while the sum is 54.

The spelling of 161718248448 in words is "one hundred sixty-one billion, seven hundred eighteen million, two hundred forty-eight thousand, four hundred forty-eight".