2644502813 has 16 divisors (see below), whose sum is σ = 2878545600. Its totient is φ = 2419312896.

The previous prime is 2644502807. The next prime is 2644502827. The reversal of 2644502813 is 3182054462.

It is a cyclic number.

It is not a de Polignac number, because 2644502813 - 2¹⁰ = 2644501789 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 (2644502803) 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, 1258838 + ... + 1260936.

It is an arithmetic number, because the mean of its divisors is an integer number (179909100).

Almost surely, 2^2644502813 is an apocalyptic number.

It is an amenable number.

2644502813 is a deficient number, since it is larger than the sum of its proper divisors (234042787).

2644502813 is a wasteful number, since it uses less digits than its factorization.

2644502813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4156.

The product of its (nonzero) digits is 46080, while the sum is 35.

The square root of 2644502813 is about 51424.7295860659. The cubic root of 2644502813 is about 1382.8699659393.

The spelling of 2644502813 in words is "two billion, six hundred forty-four million, five hundred two thousand, eight hundred thirteen".