685548785 has 32 divisors (see below), whose sum is σ = 890904960. Its totient is φ = 504741888.

The previous prime is 685548781. The next prime is 685548791. The reversal of 685548785 is 587845586.

It is a happy number.

685548785 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 685548785 - 2² = 685548781 is a prime.

It is a super-2 number, since 2×685548785² = 939954273229952450, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 685548785.

It is not an unprimeable number, because it can be changed into a prime (685548781) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1049519 + ... + 1050171.

It is an arithmetic number, because the mean of its divisors is an integer number (27840780).

Almost surely, 2^685548785 is an apocalyptic number.

It is an amenable number.

685548785 is a deficient number, since it is larger than the sum of its proper divisors (205356175).

685548785 is a wasteful number, since it uses less digits than its factorization.

685548785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 977.

The product of its digits is 10752000, while the sum is 56.

The square root of 685548785 is about 26182.9865561589. The cubic root of 685548785 is about 881.7513267753.

The spelling of 685548785 in words is "six hundred eighty-five million, five hundred forty-eight thousand, seven hundred eighty-five".