128203182164 has 6 divisors (see below), whose sum is σ = 224355568794. Its totient is φ = 64101591080.

The previous prime is 128203182143. The next prime is 128203182209. The reversal of 128203182164 is 461281302821.

It can be written as a sum of positive squares in only one way, i.e., 126778723600 + 1424458564 = 356060^2 + 37742^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16025397767 + ... + 16025397774.

It is an arithmetic number, because the mean of its divisors is an integer number (37392594799).

Almost surely, 2^128203182164 is an apocalyptic number.

It is an amenable number.

128203182164 is a deficient number, since it is larger than the sum of its proper divisors (96152386630).

128203182164 is a wasteful number, since it uses less digits than its factorization.

128203182164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32050795545 (or 32050795543 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 38.

Adding to 128203182164 its reverse (461281302821), we get a palindrome (589484484985).

The spelling of 128203182164 in words is "one hundred twenty-eight billion, two hundred three million, one hundred eighty-two thousand, one hundred sixty-four".