2685935557 has 4 divisors (see below), whose sum is σ = 2687121580. Its totient is φ = 2684749536.

The previous prime is 2685935509. The next prime is 2685935569. The reversal of 2685935557 is 7555395862.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1613307556 + 1072628001 = 40166^2 + 32751^2 .

It is a cyclic number.

It is not a de Polignac number, because 2685935557 - 2¹⁵ = 2685902789 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2685935498 and 2685935507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2685935257) 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 3 ways as a sum of consecutive naturals, for example, 589608 + ... + 594145.

It is an arithmetic number, because the mean of its divisors is an integer number (671780395).

Almost surely, 2^2685935557 is an apocalyptic number.

It is an amenable number.

2685935557 is a deficient number, since it is larger than the sum of its proper divisors (1186023).

2685935557 is a wasteful number, since it uses less digits than its factorization.

2685935557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1186022.

The product of its digits is 11340000, while the sum is 55.

The square root of 2685935557 is about 51826.0123586602. The cubic root of 2685935557 is about 1390.0546114872.

The spelling of 2685935557 in words is "two billion, six hundred eighty-five million, nine hundred thirty-five thousand, five hundred fifty-seven".