2543506856 has 32 divisors (see below), whose sum is σ = 5229619200. Its totient is φ = 1150141440.

The previous prime is 2543506843. The next prime is 2543506859. The reversal of 2543506856 is 6586053452.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is not an unprimeable number, because it can be changed into a prime (2543506859) 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 7 ways as a sum of consecutive naturals, for example, 57896 + ... + 91863.

It is an arithmetic number, because the mean of its divisors is an integer number (163425600).

Almost surely, 2^2543506856 is an apocalyptic number.

It is an amenable number.

2543506856 is an abundant number, since it is smaller than the sum of its proper divisors (2686112344).

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

2543506856 is a wasteful number, since it uses less digits than its factorization.

2543506856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149969 (or 149965 counting only the distinct ones).

The product of its (nonzero) digits is 864000, while the sum is 44.

The square root of 2543506856 is about 50433.1920068520. The cubic root of 2543506856 is about 1365.0366256548.

The spelling of 2543506856 in words is "two billion, five hundred forty-three million, five hundred six thousand, eight hundred fifty-six".