3982561067321 has 2 divisors, whose sum is σ = 3982561067322. Its totient is φ = 3982561067320.

The previous prime is 3982561067293. The next prime is 3982561067423. The reversal of 3982561067321 is 1237601652893.

It is a happy number.

3982561067321 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., 1997812633600 + 1984748433721 = 1413440^2 + 1408811^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3982561067321 is a prime.

It is not a weakly prime, because it can be changed into another prime (3982561097321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1991280533660 + 1991280533661.

It is an arithmetic number, because the mean of its divisors is an integer number (1991280533661).

Almost surely, 2^{3982561067321} is an apocalyptic number.

It is an amenable number.

3982561067321 is a deficient number, since it is larger than the sum of its proper divisors (1).

3982561067321 is an equidigital number, since it uses as much as digits as its factorization.

3982561067321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3265920, while the sum is 53.

The spelling of 3982561067321 in words is "three trillion, nine hundred eighty-two billion, five hundred sixty-one million, sixty-seven thousand, three hundred twenty-one".