2543891904 has 84 divisors (see below), whose sum is σ = 7469520240. Its totient is φ = 827274240.

The previous prime is 2543891869. The next prime is 2543891923. The reversal of 2543891904 is 4091983452.

2543891904 is a `hidden beast` number, since 25 + 438 + 9 + 190 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 2543891904.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30244 + ... + 77475.

It is an arithmetic number, because the mean of its divisors is an integer number (88922860).

Almost surely, 2^2543891904 is an apocalyptic number.

2543891904 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2543891904 is an abundant number, since it is smaller than the sum of its proper divisors (4925628336).

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

2543891904 is a wasteful number, since it uses less digits than its factorization.

2543891904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107778 (or 107765 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The square root of 2543891904 is about 50437.0092689882. The cubic root of 2543891904 is about 1365.1055040619.

The spelling of 2543891904 in words is "two billion, five hundred forty-three million, eight hundred ninety-one thousand, nine hundred four".