128413216361 has 4 divisors (see below), whose sum is σ = 128426798724. Its totient is φ = 128399634000.

The previous prime is 128413216343. The next prime is 128413216411. The reversal of 128413216361 is 163612314821.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 45169425961 + 83243790400 = 212531^2 + 288520^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128413216361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128413246361) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 6776990 + ... + 6795911.

It is an arithmetic number, because the mean of its divisors is an integer number (32106699681).

Almost surely, 2^128413216361 is an apocalyptic number.

It is an amenable number.

128413216361 is a deficient number, since it is larger than the sum of its proper divisors (13582363).

128413216361 is an equidigital number, since it uses as much as digits as its factorization.

128413216361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13582362.

The product of its digits is 41472, while the sum is 38.

The spelling of 128413216361 in words is "one hundred twenty-eight billion, four hundred thirteen million, two hundred sixteen thousand, three hundred sixty-one".