161933449896 has 96 divisors (see below), whose sum is σ = 450172663200. Its totient is φ = 52566875520.

The previous prime is 161933449889. The next prime is 161933449949. The reversal of 161933449896 is 698944339161.

161933449896 is a `hidden beast` number, since 1 + 619 + 3 + 3 + 4 + 4 + 9 + 8 + 9 + 6 = 666.

161933449896 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 276406 + ... + 632666.

It is an arithmetic number, because the mean of its divisors is an integer number (4689298575).

Almost surely, 2^161933449896 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161933449896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (225086331600).

161933449896 is an abundant number, since it is smaller than the sum of its proper divisors (288239213304).

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

161933449896 is a wasteful number, since it uses less digits than its factorization.

161933449896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356439 (or 356432 counting only the distinct ones).

The product of its digits is 30233088, while the sum is 63.

The spelling of 161933449896 in words is "one hundred sixty-one billion, nine hundred thirty-three million, four hundred forty-nine thousand, eight hundred ninety-six".