68921769841 has 2 divisors, whose sum is σ = 68921769842. Its totient is φ = 68921769840.

The previous prime is 68921769823. The next prime is 68921769859. The reversal of 68921769841 is 14896712986.

It is a balanced prime because it is at equal distance from previous prime (68921769823) and next prime (68921769859).

It can be written as a sum of positive squares in only one way, i.e., 68917275441 + 4494400 = 262521^2 + 2120^2 .

It is a cyclic number.

It is not a de Polignac number, because 68921769841 - 2¹¹ = 68921767793 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68921769841.

It is not a weakly prime, because it can be changed into another prime (68921769821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34460884920 + 34460884921.

It is an arithmetic number, because the mean of its divisors is an integer number (34460884921).

Almost surely, 2^68921769841 is an apocalyptic number.

It is an amenable number.

68921769841 is a deficient number, since it is larger than the sum of its proper divisors (1).

68921769841 is an equidigital number, since it uses as much as digits as its factorization.

68921769841 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10450944, while the sum is 61.

The spelling of 68921769841 in words is "sixty-eight billion, nine hundred twenty-one million, seven hundred sixty-nine thousand, eight hundred forty-one".