68205463841 has 2 divisors, whose sum is σ = 68205463842. Its totient is φ = 68205463840.

The previous prime is 68205463757. The next prime is 68205463861. The reversal of 68205463841 is 14836450286.

68205463841 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56206452241 + 11999011600 = 237079^2 + 109540^2 .

It is a cyclic number.

It is not a de Polignac number, because 68205463841 - 2²² = 68201269537 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (68205463861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34102731920 + 34102731921.

It is an arithmetic number, because the mean of its divisors is an integer number (34102731921).

Almost surely, 2^68205463841 is an apocalyptic number.

It is an amenable number.

68205463841 is a deficient number, since it is larger than the sum of its proper divisors (1).

68205463841 is an equidigital number, since it uses as much as digits as its factorization.

68205463841 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1105920, while the sum is 47.

The spelling of 68205463841 in words is "sixty-eight billion, two hundred five million, four hundred sixty-three thousand, eight hundred forty-one".