68857122171737 has 2 divisors, whose sum is σ = 68857122171738. Its totient is φ = 68857122171736.

The previous prime is 68857122171731. The next prime is 68857122171829. The reversal of 68857122171737 is 73717122175886.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67850623648201 + 1006498523536 = 8237149^2 + 1003244^2 .

It is a cyclic number.

It is not a de Polignac number, because 68857122171737 - 2¹⁸ = 68857121909593 is a prime.

It is not a weakly prime, because it can be changed into another prime (68857122171731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34428561085868 + 34428561085869.

It is an arithmetic number, because the mean of its divisors is an integer number (34428561085869).

Almost surely, 2^{68857122171737} is an apocalyptic number.

It is an amenable number.

68857122171737 is a deficient number, since it is larger than the sum of its proper divisors (1).

68857122171737 is an equidigital number, since it uses as much as digits as its factorization.

68857122171737 is an evil number, because the sum of its binary digits is even.

The product of its digits is 55319040, while the sum is 65.

The spelling of 68857122171737 in words is "sixty-eight trillion, eight hundred fifty-seven billion, one hundred twenty-two million, one hundred seventy-one thousand, seven hundred thirty-seven".