61444411321 has 2 divisors, whose sum is σ = 61444411322. Its totient is φ = 61444411320.

The previous prime is 61444411309. The next prime is 61444411331. The reversal of 61444411321 is 12311444416.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31016493225 + 30427918096 = 176115^2 + 174436^2 .

It is a cyclic number.

It is not a de Polignac number, because 61444411321 - 2⁹ = 61444410809 is a prime.

It is not a weakly prime, because it can be changed into another prime (61444411331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30722205660 + 30722205661.

It is an arithmetic number, because the mean of its divisors is an integer number (30722205661).

Almost surely, 2^61444411321 is an apocalyptic number.

It is an amenable number.

61444411321 is a deficient number, since it is larger than the sum of its proper divisors (1).

61444411321 is an equidigital number, since it uses as much as digits as its factorization.

61444411321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9216, while the sum is 31.

Adding to 61444411321 its reverse (12311444416), we get a palindrome (73755855737).

The spelling of 61444411321 in words is "sixty-one billion, four hundred forty-four million, four hundred eleven thousand, three hundred twenty-one".