68071370657 has 2 divisors, whose sum is σ = 68071370658. Its totient is φ = 68071370656.

The previous prime is 68071370651. The next prime is 68071370671. The reversal of 68071370657 is 75607317086.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61664808976 + 6406561681 = 248324^2 + 80041^2 .

It is a cyclic number.

It is not a de Polignac number, because 68071370657 - 2⁶ = 68071370593 is a prime.

It is a super-2 number, since 2×68071370657² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (68071370651) 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, 34035685328 + 34035685329.

It is an arithmetic number, because the mean of its divisors is an integer number (34035685329).

Almost surely, 2^68071370657 is an apocalyptic number.

It is an amenable number.

68071370657 is a deficient number, since it is larger than the sum of its proper divisors (1).

68071370657 is an equidigital number, since it uses as much as digits as its factorization.

68071370657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1481760, while the sum is 50.

The spelling of 68071370657 in words is "sixty-eight billion, seventy-one million, three hundred seventy thousand, six hundred fifty-seven".