685168533 has 12 divisors (see below), whose sum is σ = 1131071968. Its totient is φ = 391524840.

The previous prime is 685168499. The next prime is 685168537. The reversal of 685168533 is 335861586.

685168533 is a `hidden beast` number, since 6 + 8 + 51 + 68 + 533 = 666.

It is not a de Polignac number, because 685168533 - 2⁶ = 685168469 is a prime.

It is a super-2 number, since 2×685168533² = 938911837226744178, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685168537) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 5437783 + ... + 5437908.

Almost surely, 2^685168533 is an apocalyptic number.

685168533 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

It is an amenable number.

685168533 is a deficient number, since it is larger than the sum of its proper divisors (445903435).

685168533 is a wasteful number, since it uses less digits than its factorization.

685168533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10875704 (or 10875701 counting only the distinct ones).

The product of its digits is 518400, while the sum is 45.

The square root of 685168533 is about 26175.7241160584. The cubic root of 685168533 is about 881.5882701978.

The spelling of 685168533 in words is "six hundred eighty-five million, one hundred sixty-eight thousand, five hundred thirty-three".