68885207057 has 2 divisors, whose sum is σ = 68885207058. Its totient is φ = 68885207056.

The previous prime is 68885206997. The next prime is 68885207059. The reversal of 68885207057 is 75070258886.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53582527441 + 15302679616 = 231479^2 + 123704^2 .

It is a cyclic number.

It is not a de Polignac number, because 68885207057 - 2⁸ = 68885206801 is a prime.

Together with 68885207059, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 68885206993 and 68885207011.

It is not a weakly prime, because it can be changed into another prime (68885207059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34442603528 + 34442603529.

It is an arithmetic number, because the mean of its divisors is an integer number (34442603529).

Almost surely, 2^68885207057 is an apocalyptic number.

It is an amenable number.

68885207057 is a deficient number, since it is larger than the sum of its proper divisors (1).

68885207057 is an equidigital number, since it uses as much as digits as its factorization.

68885207057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7526400, while the sum is 56.

The spelling of 68885207057 in words is "sixty-eight billion, eight hundred eighty-five million, two hundred seven thousand, fifty-seven".