2685775861 has 8 divisors (see below), whose sum is σ = 2776629248. Its totient is φ = 2595186000.

The previous prime is 2685775853. The next prime is 2685775907. The reversal of 2685775861 is 1685775862.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2685775861 - 2³ = 2685775853 is a prime.

It is a Duffinian number.

It is a zygodrome in base 4.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2685775831) 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 7 ways as a sum of consecutive naturals, for example, 45045 + ... + 86026.

It is an arithmetic number, because the mean of its divisors is an integer number (347078656).

Almost surely, 2^2685775861 is an apocalyptic number.

It is an amenable number.

2685775861 is a deficient number, since it is larger than the sum of its proper divisors (90853387).

2685775861 is a wasteful number, since it uses less digits than its factorization.

2685775861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131763.

The product of its digits is 5644800, while the sum is 55.

The square root of 2685775861 is about 51824.4716422657. The cubic root of 2685775861 is about 1390.0270617370.

Subtracting from 2685775861 its reverse (1685775862), we obtain a palindrome (999999999).

The spelling of 2685775861 in words is "two billion, six hundred eighty-five million, seven hundred seventy-five thousand, eight hundred sixty-one".