68075356617 has 6 divisors (see below), whose sum is σ = 98331070682. Its totient is φ = 45383571072.

The previous prime is 68075356607. The next prime is 68075356619. The reversal of 68075356617 is 71665357086.

68075356617 is a `hidden beast` number, since 6 + 8 + 0 + 75 + 3 + 566 + 1 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 62154977481 + 5920379136 = 249309^2 + 76944^2 .

It is not a de Polignac number, because 68075356617 - 2⁸ = 68075356361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68075356619) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3781964248 + ... + 3781964265.

Almost surely, 2^68075356617 is an apocalyptic number.

It is an amenable number.

68075356617 is a deficient number, since it is larger than the sum of its proper divisors (30255714065).

68075356617 is a wasteful number, since it uses less digits than its factorization.

68075356617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7563928519 (or 7563928516 counting only the distinct ones).

The product of its (nonzero) digits is 6350400, while the sum is 54.

The spelling of 68075356617 in words is "sixty-eight billion, seventy-five million, three hundred fifty-six thousand, six hundred seventeen".