685078275 has 48 divisors (see below), whose sum is σ = 1298528000. Its totient is φ = 312197760.

The previous prime is 685078181. The next prime is 685078321. The reversal of 685078275 is 572870586.

685078275 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 26174²-1.

It is not a de Polignac number, because 685078275 - 2¹⁷ = 684947203 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 181356 + ... + 185094.

Almost surely, 2^685078275 is an apocalyptic number.

685078275 is a deficient number, since it is larger than the sum of its proper divisors (613449725).

685078275 is a wasteful number, since it uses less digits than its factorization.

685078275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4108 (or 4103 counting only the distinct ones).

The product of its (nonzero) digits is 940800, while the sum is 48.

The square root of 685078275 is about 26173.9999808971. Note that the first 4 decimals coincide. The cubic root of 685078275 is about 881.5495576356.

The spelling of 685078275 in words is "six hundred eighty-five million, seventy-eight thousand, two hundred seventy-five".