128646161 has 8 divisors (see below), whose sum is σ = 147215040. Its totient is φ = 110125008.

The previous prime is 128646127. The next prime is 128646179. The reversal of 128646161 is 161646821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 128646161 - 2²² = 124451857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128646101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5951 + ... + 17108.

It is an arithmetic number, because the mean of its divisors is an integer number (18401880).

Almost surely, 2^128646161 is an apocalyptic number.

It is an amenable number.

128646161 is a deficient number, since it is larger than the sum of its proper divisors (18568879).

128646161 is an equidigital number, since it uses as much as digits as its factorization.

128646161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23863.

The product of its digits is 13824, while the sum is 35.

The square root of 128646161 is about 11342.2291019006. The cubic root of 128646161 is about 504.8150301243.

The spelling of 128646161 in words is "one hundred twenty-eight million, six hundred forty-six thousand, one hundred sixty-one".