128316204168205 has 8 divisors (see below), whose sum is σ = 155103382557432. Its totient is φ = 101903671630848.

The previous prime is 128316204168203. The next prime is 128316204168221. The reversal of 128316204168205 is 502861402613821.

It can be written as a sum of positive squares in 4 ways, for example, as 11567249936356 + 116748954231849 = 3401066^2 + 10805043^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 128316204168205 - 2¹ = 128316204168203 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128316204168203) 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, 93661462212 + ... + 93661463581.

It is an arithmetic number, because the mean of its divisors is an integer number (19387922819679).

Almost surely, 2^{128316204168205} is an apocalyptic number.

It is an amenable number.

128316204168205 is a deficient number, since it is larger than the sum of its proper divisors (26787178389227).

128316204168205 is a wasteful number, since it uses less digits than its factorization.

128316204168205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187322925935.

The product of its (nonzero) digits is 1105920, while the sum is 49.

The spelling of 128316204168205 in words is "one hundred twenty-eight trillion, three hundred sixteen billion, two hundred four million, one hundred sixty-eight thousand, two hundred five".