685329497057 has 2 divisors, whose sum is σ = 685329497058. Its totient is φ = 685329497056.

The previous prime is 685329497029. The next prime is 685329497081. The reversal of 685329497057 is 750794923586.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 453930977536 + 231398519521 = 673744^2 + 481039^2 .

It is a cyclic number.

It is not a de Polignac number, because 685329497057 - 2⁶ = 685329496993 is a prime.

It is a super-2 number, since 2×685329497057² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 685329496984 and 685329497002.

It is not a weakly prime, because it can be changed into another prime (685329490057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342664748528 + 342664748529.

It is an arithmetic number, because the mean of its divisors is an integer number (342664748529).

Almost surely, 2^685329497057 is an apocalyptic number.

It is an amenable number.

685329497057 is a deficient number, since it is larger than the sum of its proper divisors (1).

685329497057 is an equidigital number, since it uses as much as digits as its factorization.

685329497057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 114307200, while the sum is 65.

The spelling of 685329497057 in words is "six hundred eighty-five billion, three hundred twenty-nine million, four hundred ninety-seven thousand, fifty-seven".