2564205855 has 16 divisors (see below), whose sum is σ = 4103374464. Its totient is φ = 1367361440.

The previous prime is 2564205851. The next prime is 2564205871. The reversal of 2564205855 is 5585024652.

It is not a de Polignac number, because 2564205855 - 2² = 2564205851 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2564205851) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 146692 + ... + 163238.

It is an arithmetic number, because the mean of its divisors is an integer number (256460904).

Almost surely, 2^2564205855 is an apocalyptic number.

2564205855 is a deficient number, since it is larger than the sum of its proper divisors (1539168609).

2564205855 is a wasteful number, since it uses less digits than its factorization.

2564205855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26886.

The product of its (nonzero) digits is 480000, while the sum is 42.

The square root of 2564205855 is about 50637.9882598035. The cubic root of 2564205855 is about 1368.7295048327.

The spelling of 2564205855 in words is "two billion, five hundred sixty-four million, two hundred five thousand, eight hundred fifty-five".