685682286261 has 32 divisors (see below), whose sum is σ = 1106593763328. Its totient is φ = 368676023040.

The previous prime is 685682286257. The next prime is 685682286307. The reversal of 685682286261 is 162682286586.

It is not a de Polignac number, because 685682286261 - 2² = 685682286257 is a prime.

It is a super-2 number, since 2×685682286261² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 685682286195 and 685682286204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685682286221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1164096 + ... + 1651206.

It is an arithmetic number, because the mean of its divisors is an integer number (34581055104).

Almost surely, 2^685682286261 is an apocalyptic number.

It is an amenable number.

685682286261 is a deficient number, since it is larger than the sum of its proper divisors (420911477067).

685682286261 is a wasteful number, since it uses less digits than its factorization.

685682286261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491081.

The product of its digits is 26542080, while the sum is 60.

The spelling of 685682286261 in words is "six hundred eighty-five billion, six hundred eighty-two million, two hundred eighty-six thousand, two hundred sixty-one".