68705586457 has 2 divisors, whose sum is σ = 68705586458. Its totient is φ = 68705586456.

The previous prime is 68705586449. The next prime is 68705586493. The reversal of 68705586457 is 75468550786.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44902033801 + 23803552656 = 211901^2 + 154284^2 .

It is a cyclic number.

It is not a de Polignac number, because 68705586457 - 2³ = 68705586449 is a prime.

It is a super-2 number, since 2×68705586457² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 68705586395 and 68705586404.

It is not a weakly prime, because it can be changed into another prime (68705586757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34352793228 + 34352793229.

It is an arithmetic number, because the mean of its divisors is an integer number (34352793229).

Almost surely, 2^68705586457 is an apocalyptic number.

It is an amenable number.

68705586457 is a deficient number, since it is larger than the sum of its proper divisors (1).

68705586457 is an equidigital number, since it uses as much as digits as its factorization.

68705586457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56448000, while the sum is 61.

The spelling of 68705586457 in words is "sixty-eight billion, seven hundred five million, five hundred eighty-six thousand, four hundred fifty-seven".