2543670128 has 20 divisors (see below), whose sum is σ = 5021350488. Its totient is φ = 1247837760.

The previous prime is 2543670121. The next prime is 2543670133. The reversal of 2543670128 is 8210763452.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 2543670091 and 2543670100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2543670121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1498958 + ... + 1500653.

Almost surely, 2^2543670128 is an apocalyptic number.

It is an amenable number.

2543670128 is a deficient number, since it is larger than the sum of its proper divisors (2477680360).

2543670128 is a wasteful number, since it uses less digits than its factorization.

2543670128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2999672 (or 2999666 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 38.

The square root of 2543670128 is about 50434.8106767538. The cubic root of 2543670128 is about 1365.0658330318.

The spelling of 2543670128 in words is "two billion, five hundred forty-three million, six hundred seventy thousand, one hundred twenty-eight".