2543443856 has 80 divisors (see below), whose sum is σ = 5247330816. Its totient is φ = 1192320000.

The previous prime is 2543443841. The next prime is 2543443919. The reversal of 2543443856 is 6583443452.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3680471 + ... + 3681161.

Almost surely, 2^2543443856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2543443856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2623665408).

2543443856 is an abundant number, since it is smaller than the sum of its proper divisors (2703886960).

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

2543443856 is a wasteful number, since it uses less digits than its factorization.

2543443856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 952 (or 946 counting only the distinct ones).

The product of its digits is 1382400, while the sum is 44.

The square root of 2543443856 is about 50432.5674143207. The cubic root of 2543443856 is about 1365.0253553860.

The spelling of 2543443856 in words is "two billion, five hundred forty-three million, four hundred forty-three thousand, eight hundred fifty-six".