161729799423360 has 512 divisors, whose sum is σ = 590676157440000. Its totient is φ = 36871667318784.

The previous prime is 161729799423343. The next prime is 161729799423427. The reversal of 161729799423360 is 63324997927161.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 16796111026 + ... + 16796120654.

It is an arithmetic number, because the mean of its divisors is an integer number (1153664370000).

Almost surely, 2^{161729799423360} is an apocalyptic number.

161729799423360 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 161729799423360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (295338078720000).

161729799423360 is an abundant number, since it is smaller than the sum of its proper divisors (428946358016640).

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

161729799423360 is a wasteful number, since it uses less digits than its factorization.

161729799423360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12746 (or 12734 counting only the distinct ones).

The product of its (nonzero) digits is 185177664, while the sum is 69.

The spelling of 161729799423360 in words is "one hundred sixty-one trillion, seven hundred twenty-nine billion, seven hundred ninety-nine million, four hundred twenty-three thousand, three hundred sixty".