68126220137 has 2 divisors, whose sum is σ = 68126220138. Its totient is φ = 68126220136.

The previous prime is 68126220079. The next prime is 68126220157. The reversal of 68126220137 is 73102262186.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66938108176 + 1188111961 = 258724^2 + 34469^2 .

It is a cyclic number.

It is not a de Polignac number, because 68126220137 - 2⁸ = 68126219881 is a prime.

It is a super-3 number, since 3×68126220137³ (a number of 33 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 68126220137.

It is not a weakly prime, because it can be changed into another prime (68126220157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34063110068 + 34063110069.

It is an arithmetic number, because the mean of its divisors is an integer number (34063110069).

Almost surely, 2^68126220137 is an apocalyptic number.

It is an amenable number.

68126220137 is a deficient number, since it is larger than the sum of its proper divisors (1).

68126220137 is an equidigital number, since it uses as much as digits as its factorization.

68126220137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 38.

The spelling of 68126220137 in words is "sixty-eight billion, one hundred twenty-six million, two hundred twenty thousand, one hundred thirty-seven".