67643617481417 has 2 divisors, whose sum is σ = 67643617481418. Its totient is φ = 67643617481416.

The previous prime is 67643617481393. The next prime is 67643617481501. The reversal of 67643617481417 is 71418471634676.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67508916737161 + 134700744256 = 8216381^2 + 367016^2 .

It is a cyclic number.

It is not a de Polignac number, because 67643617481417 - 2²² = 67643613287113 is a prime.

It is not a weakly prime, because it can be changed into another prime (67643617481617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33821808740708 + 33821808740709.

It is an arithmetic number, because the mean of its divisors is an integer number (33821808740709).

Almost surely, 2^{67643617481417} is an apocalyptic number.

It is an amenable number.

67643617481417 is a deficient number, since it is larger than the sum of its proper divisors (1).

67643617481417 is an equidigital number, since it uses as much as digits as its factorization.

67643617481417 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 113799168, while the sum is 65.

The spelling of 67643617481417 in words is "sixty-seven trillion, six hundred forty-three billion, six hundred seventeen million, four hundred eighty-one thousand, four hundred seventeen".