3301728478261 has 2 divisors, whose sum is σ = 3301728478262. Its totient is φ = 3301728478260.

The previous prime is 3301728478259. The next prime is 3301728478291. The reversal of 3301728478261 is 1628748271033.

3301728478261 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3297423806161 + 4304672100 = 1815881^2 + 65610^2 .

It is a cyclic number.

It is not a de Polignac number, because 3301728478261 - 2¹ = 3301728478259 is a prime.

Together with 3301728478259, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 3301728478199 and 3301728478208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3301728478291) 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 as a sum of consecutive naturals, namely, 1650864239130 + 1650864239131.

It is an arithmetic number, because the mean of its divisors is an integer number (1650864239131).

Almost surely, 2^{3301728478261} is an apocalyptic number.

It is an amenable number.

3301728478261 is a deficient number, since it is larger than the sum of its proper divisors (1).

3301728478261 is an equidigital number, since it uses as much as digits as its factorization.

3301728478261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2709504, while the sum is 52.

The spelling of 3301728478261 in words is "three trillion, three hundred one billion, seven hundred twenty-eight million, four hundred seventy-eight thousand, two hundred sixty-one".