685055550586 has 16 divisors (see below), whose sum is σ = 1179999992160. Its totient is φ = 294999997680.

The previous prime is 685055550581. The next prime is 685055550659.

685055550586 is nontrivially palindromic in base 10.

685055550586 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×685055550586² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 685055550586.

It is not an unprimeable number, because it can be changed into a prime (685055550581) 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, 819444021 + ... + 819444856.

It is an arithmetic number, because the mean of its divisors is an integer number (73749999510).

Almost surely, 2^685055550586 is an apocalyptic number.

685055550586 is a deficient number, since it is larger than the sum of its proper divisors (494944441574).

685055550586 is a wasteful number, since it uses less digits than its factorization.

685055550586 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1638888909.

The product of its (nonzero) digits is 36000000, while the sum is 58.

The spelling of 685055550586 in words is "six hundred eighty-five billion, fifty-five million, five hundred fifty thousand, five hundred eighty-six".