2543845678 has 72 divisors (see below), whose sum is σ = 4532971968. Its totient is φ = 1068672000.

The previous prime is 2543845663. The next prime is 2543845679. The reversal of 2543845678 is 8765483452.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2543845679) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 3968238 + ... + 3968878.

It is an arithmetic number, because the mean of its divisors is an integer number (62957944).

Almost surely, 2^2543845678 is an apocalyptic number.

2543845678 is a deficient number, since it is larger than the sum of its proper divisors (1989126290).

2543845678 is a wasteful number, since it uses less digits than its factorization.

2543845678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 742 (or 708 counting only the distinct ones).

The product of its digits is 6451200, while the sum is 52.

The square root of 2543845678 is about 50436.5510121380. The cubic root of 2543845678 is about 1365.0972353996.

It can be divided in two parts, 254384 and 5678, that added together give a palindrome (260062).

The spelling of 2543845678 in words is "two billion, five hundred forty-three million, eight hundred forty-five thousand, six hundred seventy-eight".