2681636213 has 4 divisors (see below), whose sum is σ = 2681859180. Its totient is φ = 2681413248.

The previous prime is 2681636197. The next prime is 2681636249. The reversal of 2681636213 is 3126361862.

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 1470108964 + 1211527249 = 38342^2 + 34807^2 .

It is a cyclic number.

It is not a de Polignac number, because 2681636213 - 2⁴ = 2681636197 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 (2681636513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92348 + ... + 117861.

It is an arithmetic number, because the mean of its divisors is an integer number (670464795).

Almost surely, 2^2681636213 is an apocalyptic number.

It is an amenable number.

2681636213 is a deficient number, since it is larger than the sum of its proper divisors (222967).

2681636213 is a wasteful number, since it uses less digits than its factorization.

2681636213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222966.

The product of its digits is 62208, while the sum is 38.

The square root of 2681636213 is about 51784.5171166054. The cubic root of 2681636213 is about 1389.3125342969.

The spelling of 2681636213 in words is "two billion, six hundred eighty-one million, six hundred thirty-six thousand, two hundred thirteen".