161704053788160 has 320 divisors, whose sum is σ = 560007067878720. Its totient is φ = 39804070625280.

The previous prime is 161704053788117. The next prime is 161704053788203. The reversal of 161704053788160 is 61887350407161.

It is an interprime number because it is at equal distance from previous prime (161704053788117) and next prime (161704053788203).

It is a tau number, because it is divible by the number of its divisors (320).

It is a super-2 number, since 2×161704053788160² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 161704053788160.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12081150 + ... + 21664770.

It is an arithmetic number, because the mean of its divisors is an integer number (1750022087121).

Almost surely, 2^{161704053788160} is an apocalyptic number.

161704053788160 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 161704053788160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (280003533939360).

161704053788160 is an abundant number, since it is smaller than the sum of its proper divisors (398303014090560).

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

161704053788160 is an frugal number, since it uses more digits than its factorization.

161704053788160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9583686 (or 9583644 counting only the distinct ones).

The product of its (nonzero) digits is 6773760, while the sum is 57.

The spelling of 161704053788160 in words is "one hundred sixty-one trillion, seven hundred four billion, fifty-three million, seven hundred eighty-eight thousand, one hundred sixty".