2556384854 has 4 divisors (see below), whose sum is σ = 3834577284. Its totient is φ = 1278192426.

The previous prime is 2556384839. The next prime is 2556384893. The reversal of 2556384854 is 4584836552.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 639096212 + ... + 639096215.

It is an arithmetic number, because the mean of its divisors is an integer number (958644321).

Almost surely, 2^2556384854 is an apocalyptic number.

2556384854 is a deficient number, since it is larger than the sum of its proper divisors (1278192430).

2556384854 is a wasteful number, since it uses less digits than its factorization.

2556384854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1278192429.

The product of its digits is 4608000, while the sum is 50.

The square root of 2556384854 is about 50560.7046430328. The cubic root of 2556384854 is about 1367.3365151638.

The spelling of 2556384854 in words is "two billion, five hundred fifty-six million, three hundred eighty-four thousand, eight hundred fifty-four".