68331444761 has 2 divisors, whose sum is σ = 68331444762. Its totient is φ = 68331444760.

The previous prime is 68331444739. The next prime is 68331444799. The reversal of 68331444761 is 16744413386.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38179206025 + 30152238736 = 195395^2 + 173644^2 .

It is a cyclic number.

It is not a de Polignac number, because 68331444761 - 2⁶ = 68331444697 is a prime.

It is not a weakly prime, because it can be changed into another prime (68331444161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34165722380 + 34165722381.

It is an arithmetic number, because the mean of its divisors is an integer number (34165722381).

Almost surely, 2^68331444761 is an apocalyptic number.

It is an amenable number.

68331444761 is a deficient number, since it is larger than the sum of its proper divisors (1).

68331444761 is an equidigital number, since it uses as much as digits as its factorization.

68331444761 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1161216, while the sum is 47.

The spelling of 68331444761 in words is "sixty-eight billion, three hundred thirty-one million, four hundred forty-four thousand, seven hundred sixty-one".