2685643775 has 6 divisors (see below), whose sum is σ = 3330198312. Its totient is φ = 2148515000.

The previous prime is 2685643759. The next prime is 2685643777. The reversal of 2685643775 is 5773465862.

It is a happy number.

It is not a de Polignac number, because 2685643775 - 2⁴ = 2685643759 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 (2685643777) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 53712851 + ... + 53712900.

It is an arithmetic number, because the mean of its divisors is an integer number (555033052).

Almost surely, 2^2685643775 is an apocalyptic number.

2685643775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2685643775 is a deficient number, since it is larger than the sum of its proper divisors (644554537).

2685643775 is a wasteful number, since it uses less digits than its factorization.

2685643775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107425761 (or 107425756 counting only the distinct ones).

The product of its digits is 8467200, while the sum is 53.

The square root of 2685643775 is about 51823.1972672470. The cubic root of 2685643775 is about 1390.0042742653.

The spelling of 2685643775 in words is "two billion, six hundred eighty-five million, six hundred forty-three thousand, seven hundred seventy-five".