161783930880 has 1680 divisors, whose sum is σ = 708695551872. Its totient is φ = 35035545600.

The previous prime is 161783930879. The next prime is 161783930887. The reversal of 161783930880 is 88039387161.

161783930880 is a `hidden beast` number, since 1 + 6 + 178 + 393 + 0 + 8 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161783930887) 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 119 ways as a sum of consecutive naturals, for example, 5218836465 + ... + 5218836495.

Almost surely, 2^161783930880 is an apocalyptic number.

161783930880 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 161783930880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (354347775936).

161783930880 is an abundant number, since it is smaller than the sum of its proper divisors (546911620992).

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

161783930880 is a wasteful number, since it uses less digits than its factorization.

161783930880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109 (or 65 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 54.

The spelling of 161783930880 in words is "one hundred sixty-one billion, seven hundred eighty-three million, nine hundred thirty thousand, eight hundred eighty".