2643719813 has 16 divisors (see below), whose sum is σ = 3077424000. Its totient is φ = 2224392192.

The previous prime is 2643719807. The next prime is 2643719833. The reversal of 2643719813 is 3189173462.

It is a cyclic number.

It is not a de Polignac number, because 2643719813 - 2¹⁰ = 2643718789 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2643719833) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71333 + ... + 101861.

It is an arithmetic number, because the mean of its divisors is an integer number (192339000).

Almost surely, 2^2643719813 is an apocalyptic number.

It is an amenable number.

2643719813 is a deficient number, since it is larger than the sum of its proper divisors (433704187).

2643719813 is a wasteful number, since it uses less digits than its factorization.

2643719813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30764.

The product of its digits is 217728, while the sum is 44.

The square root of 2643719813 is about 51417.1159537367. The cubic root of 2643719813 is about 1382.7334696999.

The spelling of 2643719813 in words is "two billion, six hundred forty-three million, seven hundred nineteen thousand, eight hundred thirteen".