68075071745 has 8 divisors (see below), whose sum is σ = 86495385384. Its totient is φ = 51256524544.

The previous prime is 68075071741. The next prime is 68075071777. The reversal of 68075071745 is 54717057086.

68075071745 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 260912²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 24507276304 + 43567795441 = 156548^2 + 208729^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 68075071745 - 2² = 68075071741 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68075071693 and 68075071702.

It is not an unprimeable number, because it can be changed into a prime (68075071741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 400441514 + ... + 400441683.

It is an arithmetic number, because the mean of its divisors is an integer number (10811923173).

Almost surely, 2^68075071745 is an apocalyptic number.

It is an amenable number.

68075071745 is a deficient number, since it is larger than the sum of its proper divisors (18420313639).

68075071745 is a wasteful number, since it uses less digits than its factorization.

68075071745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 800883219.

The product of its (nonzero) digits is 1646400, while the sum is 50.

The spelling of 68075071745 in words is "sixty-eight billion, seventy-five million, seventy-one thousand, seven hundred forty-five".