68850858281 has 2 divisors, whose sum is σ = 68850858282. Its totient is φ = 68850858280.

The previous prime is 68850858217. The next prime is 68850858289. The reversal of 68850858281 is 18285805886.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57260182681 + 11590675600 = 239291^2 + 107660^2 .

It is a cyclic number.

It is not a de Polignac number, because 68850858281 - 2⁶ = 68850858217 is a prime.

It is a super-2 number, since 2×68850858281² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 68850858281.

It is not a weakly prime, because it can be changed into another prime (68850858289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34425429140 + 34425429141.

It is an arithmetic number, because the mean of its divisors is an integer number (34425429141).

Almost surely, 2^68850858281 is an apocalyptic number.

It is an amenable number.

68850858281 is a deficient number, since it is larger than the sum of its proper divisors (1).

68850858281 is an equidigital number, since it uses as much as digits as its factorization.

68850858281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9830400, while the sum is 59.

The spelling of 68850858281 in words is "sixty-eight billion, eight hundred fifty million, eight hundred fifty-eight thousand, two hundred eighty-one".