685563045 has 16 divisors (see below), whose sum is σ = 1134725760. Its totient is φ = 353025344.

The previous prime is 685563037. The next prime is 685563107. The reversal of 685563045 is 540365586.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 685563045 - 2³ = 685563037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 685562988 and 685563006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 787569 + ... + 788438.

It is an arithmetic number, because the mean of its divisors is an integer number (70920360).

Almost surely, 2^685563045 is an apocalyptic number.

It is an amenable number.

685563045 is a deficient number, since it is larger than the sum of its proper divisors (449162715).

685563045 is a wasteful number, since it uses less digits than its factorization.

685563045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1576044.

The product of its (nonzero) digits is 432000, while the sum is 42.

The square root of 685563045 is about 26183.2588689796. The cubic root of 685563045 is about 881.7574404597.

The spelling of 685563045 in words is "six hundred eighty-five million, five hundred sixty-three thousand, forty-five".