2643648804 has 36 divisors (see below), whose sum is σ = 6684309996. Its totient is φ = 880985088.

The previous prime is 2643648803. The next prime is 2643648823. The reversal of 2643648804 is 4088463462.

It can be written as a sum of positive squares in 2 ways, for example, as 1524746304 + 1118902500 = 39048^2 + 33450^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 2643648804.

It is not an unprimeable number, because it can be changed into a prime (2643648803) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 181372 + ... + 195404.

Almost surely, 2^2643648804 is an apocalyptic number.

It is an amenable number.

2643648804 is an abundant number, since it is smaller than the sum of its proper divisors (4040661192).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2643648804 is a wasteful number, since it uses less digits than its factorization.

2643648804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19276 (or 19271 counting only the distinct ones).

The product of its (nonzero) digits is 884736, while the sum is 45.

The square root of 2643648804 is about 51416.4254300121. The cubic root of 2643648804 is about 1382.7210897445.

The spelling of 2643648804 in words is "two billion, six hundred forty-three million, six hundred forty-eight thousand, eight hundred four".