161923484800 has 384 divisors, whose sum is σ = 512210609280. Its totient is φ = 49102848000.

The previous prime is 161923484783. The next prime is 161923484813. The reversal of 161923484800 is 8484329161.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9107920 + ... + 9125680.

It is an arithmetic number, because the mean of its divisors is an integer number (1333881795).

Almost surely, 2^161923484800 is an apocalyptic number.

161923484800 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 161923484800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (256105304640).

161923484800 is an abundant number, since it is smaller than the sum of its proper divisors (350287124480).

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

161923484800 is a wasteful number, since it uses less digits than its factorization.

161923484800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17840 (or 17823 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 46.

The spelling of 161923484800 in words is "one hundred sixty-one billion, nine hundred twenty-three million, four hundred eighty-four thousand, eight hundred".