68353671517 has 2 divisors, whose sum is σ = 68353671518. Its totient is φ = 68353671516.

The previous prime is 68353671469. The next prime is 68353671541. The reversal of 68353671517 is 71517635386.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64201931161 + 4151740356 = 253381^2 + 64434^2 .

It is a cyclic number.

It is not a de Polignac number, because 68353671517 - 2¹⁹ = 68353147229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68353671577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34176835758 + 34176835759.

It is an arithmetic number, because the mean of its divisors is an integer number (34176835759).

Almost surely, 2^68353671517 is an apocalyptic number.

It is an amenable number.

68353671517 is a deficient number, since it is larger than the sum of its proper divisors (1).

68353671517 is an equidigital number, since it uses as much as digits as its factorization.

68353671517 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3175200, while the sum is 52.

The spelling of 68353671517 in words is "sixty-eight billion, three hundred fifty-three million, six hundred seventy-one thousand, five hundred seventeen".