2543556678 has 32 divisors (see below), whose sum is σ = 5498691072. Its totient is φ = 779738400.

The previous prime is 2543556661. The next prime is 2543556773. The reversal of 2543556678 is 8766553452.

2543556678 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 2543556678.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39028 + ... + 81303.

It is an arithmetic number, because the mean of its divisors is an integer number (171834096).

Almost surely, 2^2543556678 is an apocalyptic number.

2543556678 is an abundant number, since it is smaller than the sum of its proper divisors (2955134394).

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

2543556678 is a wasteful number, since it uses less digits than its factorization.

2543556678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120620.

The product of its digits is 6048000, while the sum is 51.

The square root of 2543556678 is about 50433.6859450110. The cubic root of 2543556678 is about 1365.0455383377.

The spelling of 2543556678 in words is "two billion, five hundred forty-three million, five hundred fifty-six thousand, six hundred seventy-eight".