5643671813 has 4 divisors (see below), whose sum is σ = 6077800428. Its totient is φ = 5209543200.

The previous prime is 5643671801. The next prime is 5643671833. The reversal of 5643671813 is 3181763465.

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 1519206529 + 4124465284 = 38977^2 + 64222^2 .

It is a cyclic number.

It is not a de Polignac number, because 5643671813 - 2¹⁸ = 5643409669 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 (5643671833) 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, 217064288 + ... + 217064313.

It is an arithmetic number, because the mean of its divisors is an integer number (1519450107).

Almost surely, 2^5643671813 is an apocalyptic number.

It is an amenable number.

5643671813 is a deficient number, since it is larger than the sum of its proper divisors (434128615).

5643671813 is a wasteful number, since it uses less digits than its factorization.

5643671813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434128614.

The product of its digits is 362880, while the sum is 44.

The square root of 5643671813 is about 75124.3756246932. The cubic root of 5643671813 is about 1780.4122906638.

The spelling of 5643671813 in words is "five billion, six hundred forty-three million, six hundred seventy-one thousand, eight hundred thirteen".