2685368561 has 4 divisors (see below), whose sum is σ = 2700370800. Its totient is φ = 2670366324.

The previous prime is 2685368557. The next prime is 2685368579. The reversal of 2685368561 is 1658635862.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2685368561 - 2² = 2685368557 is a prime.

It is a super-2 number, since 2×2685368561² = 14422408616814421442, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2685368531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7500851 + ... + 7501208.

It is an arithmetic number, because the mean of its divisors is an integer number (675092700).

Almost surely, 2^2685368561 is an apocalyptic number.

It is an amenable number.

2685368561 is a deficient number, since it is larger than the sum of its proper divisors (15002239).

2685368561 is a wasteful number, since it uses less digits than its factorization.

2685368561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15002238.

The product of its digits is 2073600, while the sum is 50.

The square root of 2685368561 is about 51820.5418825392. The cubic root of 2685368561 is about 1389.9567919561.

The spelling of 2685368561 in words is "two billion, six hundred eighty-five million, three hundred sixty-eight thousand, five hundred sixty-one".