2543945004 has 18 divisors (see below), whose sum is σ = 6430527740. Its totient is φ = 847981656.

The previous prime is 2543945003. The next prime is 2543945011. The reversal of 2543945004 is 4005493452.

It is a happy number.

2543945004 is a `hidden beast` number, since 25 + 43 + 94 + 500 + 4 = 666.

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: 70665139 = 2543945004 / (2 + 5 + 4 + 3 + 9 + 4 + 5 + 0 + 0 + 4).

It is a self number, because there is not a number n which added to its sum of digits gives 2543945004.

It is not an unprimeable number, because it can be changed into a prime (2543945003) 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, 35332534 + ... + 35332605.

Almost surely, 2^2543945004 is an apocalyptic number.

It is an amenable number.

2543945004 is an abundant number, since it is smaller than the sum of its proper divisors (3886582736).

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

2543945004 is a wasteful number, since it uses less digits than its factorization.

2543945004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70665149 (or 70665144 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The square root of 2543945004 is about 50437.5356654149. The cubic root of 2543945004 is about 1365.1150021853.

The spelling of 2543945004 in words is "two billion, five hundred forty-three million, nine hundred forty-five thousand, four".