685823055 has 16 divisors (see below), whose sum is σ = 1113696384. Its totient is φ = 360312480.

The previous prime is 685823051. The next prime is 685823119. The reversal of 685823055 is 550328586.

It is not a de Polignac number, because 685823055 - 2² = 685823051 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 685822998 and 685823016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685823051) 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, 340201 + ... + 342210.

It is an arithmetic number, because the mean of its divisors is an integer number (69606024).

Almost surely, 2^685823055 is an apocalyptic number.

685823055 is a deficient number, since it is larger than the sum of its proper divisors (427873329).

685823055 is a wasteful number, since it uses less digits than its factorization.

685823055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 682486.

The product of its (nonzero) digits is 288000, while the sum is 42.

The square root of 685823055 is about 26188.2235938217. The cubic root of 685823055 is about 881.8688995860.

The spelling of 685823055 in words is "six hundred eighty-five million, eight hundred twenty-three thousand, fifty-five".