2543684004 has 18 divisors (see below), whose sum is σ = 6429867990. Its totient is φ = 847894656.

The previous prime is 2543683999. The next prime is 2543684009. The reversal of 2543684004 is 4004863452.

2543684004 is a `hidden beast` number, since 254 + 368 + 40 + 0 + 4 = 666.

2543684004 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2543683999) and next prime (2543684009).

It can be written as a sum of positive squares in only one way, i.e., 1711476900 + 832207104 = 41370^2 + 28848^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 70657889 = 2543684004 / (2 + 5 + 4 + 3 + 6 + 8 + 4 + 0 + 0 + 4).

It is a self number, because there is not a number n which added to its sum of digits gives 2543684004.

It is not an unprimeable number, because it can be changed into a prime (2543684009) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 35328909 + ... + 35328980.

Almost surely, 2^2543684004 is an apocalyptic number.

It is an amenable number.

2543684004 is an abundant number, since it is smaller than the sum of its proper divisors (3886183986).

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

2543684004 is a wasteful number, since it uses less digits than its factorization.

2543684004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70657899 (or 70657894 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 36.

The square root of 2543684004 is about 50434.9482402827. The cubic root of 2543684004 is about 1365.0683152220.

The spelling of 2543684004 in words is "two billion, five hundred forty-three million, six hundred eighty-four thousand, four".