128180205146 has 32 divisors (see below), whose sum is σ = 231953760000. Its totient is φ = 53040076656.

The previous prime is 128180205067. The next prime is 128180205151. The reversal of 128180205146 is 641502081821.

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 15 ways as a sum of consecutive naturals, for example, 3201686 + ... + 3241473.

It is an arithmetic number, because the mean of its divisors is an integer number (7248555000).

Almost surely, 2^128180205146 is an apocalyptic number.

128180205146 is a deficient number, since it is larger than the sum of its proper divisors (103773554854).

128180205146 is an equidigital number, since it uses as much as digits as its factorization.

128180205146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6443211 (or 6443197 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 38.

Adding to 128180205146 its reverse (641502081821), we get a palindrome (769682286967).

The spelling of 128180205146 in words is "one hundred twenty-eight billion, one hundred eighty million, two hundred five thousand, one hundred forty-six".