685359185567 has 8 divisors (see below), whose sum is σ = 788256607776. Its totient is φ = 583709005152.

The previous prime is 685359185549. The next prime is 685359185579. The reversal of 685359185567 is 765581953586.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 685359185567 - 2¹⁶ = 685359120031 is a prime.

It is a super-2 number, since 2×685359185567² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 685359185497 and 685359185506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685359185867) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 311809268 + ... + 311811465.

It is an arithmetic number, because the mean of its divisors is an integer number (98532075972).

Almost surely, 2^685359185567 is an apocalyptic number.

685359185567 is a deficient number, since it is larger than the sum of its proper divisors (102897422209).

685359185567 is a wasteful number, since it uses less digits than its factorization.

685359185567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 623620897.

The product of its digits is 272160000, while the sum is 68.

The spelling of 685359185567 in words is "six hundred eighty-five billion, three hundred fifty-nine million, one hundred eighty-five thousand, five hundred sixty-seven".