685505574 has 36 divisors (see below), whose sum is σ = 1608308676. Its totient is φ = 210923856.

The previous prime is 685505563. The next prime is 685505581. The reversal of 685505574 is 475505586.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 109632 + ... + 115715.

It is an arithmetic number, because the mean of its divisors is an integer number (44675241).

Almost surely, 2^685505574 is an apocalyptic number.

685505574 is an abundant number, since it is smaller than the sum of its proper divisors (922803102).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

685505574 is a wasteful number, since it uses less digits than its factorization.

685505574 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225381 (or 225365 counting only the distinct ones).

The product of its (nonzero) digits is 840000, while the sum is 45.

The square root of 685505574 is about 26182.1613699099. The cubic root of 685505574 is about 881.7328004219.

The spelling of 685505574 in words is "six hundred eighty-five million, five hundred five thousand, five hundred seventy-four".