2563889855 has 16 divisors (see below), whose sum is σ = 3187490400. Its totient is φ = 1977440640.

The previous prime is 2563889851. The next prime is 2563889857. The reversal of 2563889855 is 5589883652.

It is a happy number.

It is not a de Polignac number, because 2563889855 - 2² = 2563889851 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2563889794 and 2563889803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2563889851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87401 + ... + 112989.

It is an arithmetic number, because the mean of its divisors is an integer number (199218150).

Almost surely, 2^2563889855 is an apocalyptic number.

2563889855 is a deficient number, since it is larger than the sum of its proper divisors (623600545).

2563889855 is a wasteful number, since it uses less digits than its factorization.

2563889855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26314.

The product of its digits is 20736000, while the sum is 59.

The square root of 2563889855 is about 50634.8679765238. The cubic root of 2563889855 is about 1368.6732773798.

The spelling of 2563889855 in words is "two billion, five hundred sixty-three million, eight hundred eighty-nine thousand, eight hundred fifty-five".