68787818753 has 2 divisors, whose sum is σ = 68787818754. Its totient is φ = 68787818752.

The previous prime is 68787818741. The next prime is 68787818773. The reversal of 68787818753 is 35781878786.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68787126529 + 692224 = 262273^2 + 832^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68787818753 is a prime.

It is not a weakly prime, because it can be changed into another prime (68787818773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34393909376 + 34393909377.

It is an arithmetic number, because the mean of its divisors is an integer number (34393909377).

Almost surely, 2^68787818753 is an apocalyptic number.

It is an amenable number.

68787818753 is a deficient number, since it is larger than the sum of its proper divisors (1).

68787818753 is an equidigital number, since it uses as much as digits as its factorization.

68787818753 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 126443520, while the sum is 68.

The spelling of 68787818753 in words is "sixty-eight billion, seven hundred eighty-seven million, eight hundred eighteen thousand, seven hundred fifty-three".