685578355 has 24 divisors (see below), whose sum is σ = 1044016560. Its totient is φ = 427371840.

The previous prime is 685578347. The next prime is 685578367. The reversal of 685578355 is 553875586.

685578355 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 685578355 - 2³ = 685578347 is a prime.

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 124500 + ... + 129889.

It is an arithmetic number, because the mean of its divisors is an integer number (43500690).

Almost surely, 2^685578355 is an apocalyptic number.

685578355 is a deficient number, since it is larger than the sum of its proper divisors (358438205).

685578355 is a wasteful number, since it uses less digits than its factorization.

685578355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254419 (or 254412 counting only the distinct ones).

The product of its digits is 5040000, while the sum is 52.

The square root of 685578355 is about 26183.5512297320. The cubic root of 685578355 is about 881.7640042158.

The spelling of 685578355 in words is "six hundred eighty-five million, five hundred seventy-eight thousand, three hundred fifty-five".