161783331163968 has 28 divisors (see below), whose sum is σ = 428051730371840. Its totient is φ = 53927777054592.

The previous prime is 161783331163957. The next prime is 161783331163981. The reversal of 161783331163968 is 869361133387161.

It is a junction number, because it is equal to n+sod(n) for n = 161783331163899 and 161783331163908.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 421310758048 + ... + 421310758431.

Almost surely, 2^{161783331163968} is an apocalyptic number.

It is an amenable number.

161783331163968 is an abundant number, since it is smaller than the sum of its proper divisors (266268399207872).

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

161783331163968 is an equidigital number, since it uses as much as digits as its factorization.

161783331163968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 842621516494 (or 842621516484 counting only the distinct ones).

The product of its digits is 70543872, while the sum is 66.

The spelling of 161783331163968 in words is "one hundred sixty-one trillion, seven hundred eighty-three billion, three hundred thirty-one million, one hundred sixty-three thousand, nine hundred sixty-eight".