68531673697 has 2 divisors, whose sum is σ = 68531673698. Its totient is φ = 68531673696.

The previous prime is 68531673571. The next prime is 68531673703. The reversal of 68531673697 is 79637613586.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64280503296 + 4251170401 = 253536^2 + 65201^2 .

It is a cyclic number.

It is not a de Polignac number, because 68531673697 - 2²⁷ = 68397455969 is a prime.

It is not a weakly prime, because it can be changed into another prime (68531683697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34265836848 + 34265836849.

It is an arithmetic number, because the mean of its divisors is an integer number (34265836849).

Almost surely, 2^68531673697 is an apocalyptic number.

It is an amenable number.

68531673697 is a deficient number, since it is larger than the sum of its proper divisors (1).

68531673697 is an equidigital number, since it uses as much as digits as its factorization.

68531673697 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34292160, while the sum is 61.

The spelling of 68531673697 in words is "sixty-eight billion, five hundred thirty-one million, six hundred seventy-three thousand, six hundred ninety-seven".