161308128 has 96 divisors (see below), whose sum is σ = 444165120. Its totient is φ = 51194880.

The previous prime is 161308127. The next prime is 161308129. The reversal of 161308128 is 821803161.

It is an interprime number because it is at equal distance from previous prime (161308127) and next prime (161308129).

It is a tau number, because it is divible by the number of its divisors (96).

It is a junction number, because it is equal to n+sod(n) for n = 161308095 and 161308104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161308127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 198988 + ... + 199796.

It is an arithmetic number, because the mean of its divisors is an integer number (4626720).

Almost surely, 2^161308128 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161308128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (222082560).

161308128 is an abundant number, since it is smaller than the sum of its proper divisors (282856992).

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

161308128 is a wasteful number, since it uses less digits than its factorization.

161308128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 920 (or 912 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 161308128 is about 12700.7136807346. The cubic root of 161308128 is about 544.3590118652.

The spelling of 161308128 in words is "one hundred sixty-one million, three hundred eight thousand, one hundred twenty-eight".