685260886609 has 16 divisors (see below), whose sum is σ = 759247965952. Its totient is φ = 614571712128.

The previous prime is 685260886579. The next prime is 685260886619. The reversal of 685260886609 is 906688062586.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 685260886609 - 2⁵ = 685260886577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (685260886619) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5325129 + ... + 5452294.

It is an arithmetic number, because the mean of its divisors is an integer number (47452997872).

Almost surely, 2^685260886609 is an apocalyptic number.

It is an amenable number.

685260886609 is a deficient number, since it is larger than the sum of its proper divisors (73987079343).

685260886609 is a wasteful number, since it uses less digits than its factorization.

685260886609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10777576.

The product of its (nonzero) digits is 59719680, while the sum is 64.

The spelling of 685260886609 in words is "six hundred eighty-five billion, two hundred sixty million, eight hundred eighty-six thousand, six hundred nine".