2684661853 has 4 divisors (see below), whose sum is σ = 2685263868. Its totient is φ = 2684059840.

The previous prime is 2684661817. The next prime is 2684661857. The reversal of 2684661853 is 3581664862.

It is a happy number.

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 1431714244 + 1252947609 = 37838^2 + 35397^2 .

It is a cyclic number.

It is not a de Polignac number, because 2684661853 - 2¹⁷ = 2684530781 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2684661797 and 2684661806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2684661857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 294268 + ... + 303253.

It is an arithmetic number, because the mean of its divisors is an integer number (671315967).

Almost surely, 2^2684661853 is an apocalyptic number.

It is an amenable number.

2684661853 is a deficient number, since it is larger than the sum of its proper divisors (602015).

2684661853 is an equidigital number, since it uses as much as digits as its factorization.

2684661853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 602014.

The product of its digits is 1658880, while the sum is 49.

The square root of 2684661853 is about 51813.7226321367. The cubic root of 2684661853 is about 1389.8348496919.

The spelling of 2684661853 in words is "two billion, six hundred eighty-four million, six hundred sixty-one thousand, eight hundred fifty-three".