68205463757 has 2 divisors, whose sum is σ = 68205463758. Its totient is φ = 68205463756.

The previous prime is 68205463661. The next prime is 68205463841. The reversal of 68205463757 is 75736450286.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67318972681 + 886491076 = 259459^2 + 29774^2 .

It is a cyclic number.

It is not a de Polignac number, because 68205463757 - 2¹⁰ = 68205462733 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 68205463699 and 68205463708.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68205423757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34102731878 + 34102731879.

It is an arithmetic number, because the mean of its divisors is an integer number (34102731879).

Almost surely, 2^68205463757 is an apocalyptic number.

It is an amenable number.

68205463757 is a deficient number, since it is larger than the sum of its proper divisors (1).

68205463757 is an equidigital number, since it uses as much as digits as its factorization.

68205463757 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8467200, while the sum is 53.

The spelling of 68205463757 in words is "sixty-eight billion, two hundred five million, four hundred sixty-three thousand, seven hundred fifty-seven".