685841430425 has 6 divisors (see below), whose sum is σ = 850443373758. Its totient is φ = 548673144320.

The previous prime is 685841430397. The next prime is 685841430431. The reversal of 685841430425 is 524034148586.

It can be written as a sum of positive squares in 3 ways, for example, as 85321825801 + 600519604624 = 292099^2 + 774932^2 .

It is not a de Polignac number, because 685841430425 - 2⁶ = 685841430361 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13716828584 + ... + 13716828633.

It is an arithmetic number, because the mean of its divisors is an integer number (141740562293).

Almost surely, 2^685841430425 is an apocalyptic number.

It is an amenable number.

685841430425 is a deficient number, since it is larger than the sum of its proper divisors (164601943333).

685841430425 is a wasteful number, since it uses less digits than its factorization.

685841430425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27433657227 (or 27433657222 counting only the distinct ones).

The product of its (nonzero) digits is 3686400, while the sum is 50.

The spelling of 685841430425 in words is "six hundred eighty-five billion, eight hundred forty-one million, four hundred thirty thousand, four hundred twenty-five".