685532306353 has 2 divisors, whose sum is σ = 685532306354. Its totient is φ = 685532306352.

The previous prime is 685532306339. The next prime is 685532306429. The reversal of 685532306353 is 353603235586.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 555118873969 + 130413432384 = 745063^2 + 361128^2 .

It is a cyclic number.

It is not a de Polignac number, because 685532306353 - 2²⁵ = 685498751921 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 685532306297 and 685532306306.

It is not a weakly prime, because it can be changed into another prime (685532306453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342766153176 + 342766153177.

It is an arithmetic number, because the mean of its divisors is an integer number (342766153177).

Almost surely, 2^685532306353 is an apocalyptic number.

It is an amenable number.

685532306353 is a deficient number, since it is larger than the sum of its proper divisors (1).

685532306353 is an equidigital number, since it uses as much as digits as its factorization.

685532306353 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832000, while the sum is 49.

The spelling of 685532306353 in words is "six hundred eighty-five billion, five hundred thirty-two million, three hundred six thousand, three hundred fifty-three".