685738442259 has 96 divisors (see below), whose sum is σ = 1192715334720. Its totient is φ = 375057506304.

The previous prime is 685738442197. The next prime is 685738442261. The reversal of 685738442259 is 952244837586.

685738442259 is a `hidden beast` number, since 6 + 8 + 573 + 8 + 4 + 4 + 2 + 2 + 59 = 666.

It is not a de Polignac number, because 685738442259 - 2⁷ = 685738442131 is a prime.

It is a super-2 number, since 2×685738442259² (a number of 24 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (63) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 685738442196 and 685738442205.

It is not an unprimeable number, because it can be changed into a prime (685738442159) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 11799597 + ... + 11857569.

It is an arithmetic number, because the mean of its divisors is an integer number (12424118070).

Almost surely, 2^685738442259 is an apocalyptic number.

685738442259 is a deficient number, since it is larger than the sum of its proper divisors (506976892461).

685738442259 is a wasteful number, since it uses less digits than its factorization.

685738442259 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58341 (or 58338 counting only the distinct ones).

The product of its digits is 116121600, while the sum is 63.

The spelling of 685738442259 in words is "six hundred eighty-five billion, seven hundred thirty-eight million, four hundred forty-two thousand, two hundred fifty-nine".