2685935561 has 12 divisors (see below), whose sum is σ = 2880545472. Its totient is φ = 2499689808.

The previous prime is 2685935509. The next prime is 2685935569. The reversal of 2685935561 is 1655395862.

It is a de Polignac number, because none of the positive numbers 2^k-2685935561 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2685935569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11165 + ... + 74138.

It is an arithmetic number, because the mean of its divisors is an integer number (240045456).

Almost surely, 2^2685935561 is an apocalyptic number.

It is an amenable number.

2685935561 is a deficient number, since it is larger than the sum of its proper divisors (194609911).

2685935561 is an equidigital number, since it uses as much as digits as its factorization.

2685935561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85400 (or 85363 counting only the distinct ones).

The product of its digits is 1944000, while the sum is 50.

The square root of 2685935561 is about 51826.0123972509. The cubic root of 2685935561 is about 1390.0546121772.

The spelling of 2685935561 in words is "two billion, six hundred eighty-five million, nine hundred thirty-five thousand, five hundred sixty-one".