68171678447 has 2 divisors, whose sum is σ = 68171678448. Its totient is φ = 68171678446.

The previous prime is 68171678429. The next prime is 68171678467. The reversal of 68171678447 is 74487617186.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68171678447 - 2⁸ = 68171678191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68171678417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34085839223 + 34085839224.

It is an arithmetic number, because the mean of its divisors is an integer number (34085839224).

Almost surely, 2^68171678447 is an apocalyptic number.

68171678447 is a deficient number, since it is larger than the sum of its proper divisors (1).

68171678447 is an equidigital number, since it uses as much as digits as its factorization.

68171678447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12644352, while the sum is 59.

The spelling of 68171678447 in words is "sixty-eight billion, one hundred seventy-one million, six hundred seventy-eight thousand, four hundred forty-seven".