685413415481 has 2 divisors, whose sum is σ = 685413415482. Its totient is φ = 685413415480.

The previous prime is 685413415399. The next prime is 685413415571. The reversal of 685413415481 is 184514314586.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 538045722256 + 147367693225 = 733516^2 + 383885^2 .

It is a cyclic number.

It is not a de Polignac number, because 685413415481 - 2¹⁰ = 685413414457 is a prime.

It is a super-2 number, since 2×685413415481² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (685413415081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342706707740 + 342706707741.

It is an arithmetic number, because the mean of its divisors is an integer number (342706707741).

Almost surely, 2^685413415481 is an apocalyptic number.

It is an amenable number.

685413415481 is a deficient number, since it is larger than the sum of its proper divisors (1).

685413415481 is an equidigital number, since it uses as much as digits as its factorization.

685413415481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1843200, while the sum is 50.

The spelling of 685413415481 in words is "six hundred eighty-five billion, four hundred thirteen million, four hundred fifteen thousand, four hundred eighty-one".