38668492817 has 2 divisors, whose sum is σ = 38668492818. Its totient is φ = 38668492816.

The previous prime is 38668492777. The next prime is 38668492831. The reversal of 38668492817 is 71829486683.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34152518416 + 4515974401 = 184804^2 + 67201^2 .

It is a cyclic number.

It is not a de Polignac number, because 38668492817 - 2¹⁴ = 38668476433 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 38668492817.

It is not a weakly prime, because it can be changed into another prime (38668492867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19334246408 + 19334246409.

It is an arithmetic number, because the mean of its divisors is an integer number (19334246409).

Almost surely, 2^38668492817 is an apocalyptic number.

It is an amenable number.

38668492817 is a deficient number, since it is larger than the sum of its proper divisors (1).

38668492817 is an equidigital number, since it uses as much as digits as its factorization.

38668492817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27869184, while the sum is 62.

The spelling of 38668492817 in words is "thirty-eight billion, six hundred sixty-eight million, four hundred ninety-two thousand, eight hundred seventeen".