685518535337 has 2 divisors, whose sum is σ = 685518535338. Its totient is φ = 685518535336.

The previous prime is 685518535327. The next prime is 685518535349. The reversal of 685518535337 is 733535815586.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 580394090896 + 105124444441 = 761836^2 + 324229^2 .

It is a cyclic number.

It is not a de Polignac number, because 685518535337 - 2³² = 681223568041 is a prime.

It is not a weakly prime, because it can be changed into another prime (685518535327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342759267668 + 342759267669.

It is an arithmetic number, because the mean of its divisors is an integer number (342759267669).

Almost surely, 2^685518535337 is an apocalyptic number.

It is an amenable number.

685518535337 is a deficient number, since it is larger than the sum of its proper divisors (1).

685518535337 is an equidigital number, since it uses as much as digits as its factorization.

685518535337 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45360000, while the sum is 59.

The spelling of 685518535337 in words is "six hundred eighty-five billion, five hundred eighteen million, five hundred thirty-five thousand, three hundred thirty-seven".