61968322261 has 2 divisors, whose sum is σ = 61968322262. Its totient is φ = 61968322260.

The previous prime is 61968322111. The next prime is 61968322279. The reversal of 61968322261 is 16222386916.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32650321636 + 29318000625 = 180694^2 + 171225^2 .

It is a cyclic number.

It is not a de Polignac number, because 61968322261 - 2¹¹ = 61968320213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61968322961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30984161130 + 30984161131.

It is an arithmetic number, because the mean of its divisors is an integer number (30984161131).

Almost surely, 2^61968322261 is an apocalyptic number.

It is an amenable number.

61968322261 is a deficient number, since it is larger than the sum of its proper divisors (1).

61968322261 is an equidigital number, since it uses as much as digits as its factorization.

61968322261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 373248, while the sum is 46.

The spelling of 61968322261 in words is "sixty-one billion, nine hundred sixty-eight million, three hundred twenty-two thousand, two hundred sixty-one".