2564512855 has 16 divisors (see below), whose sum is σ = 3141231840. Its totient is φ = 2009208448.

The previous prime is 2564512843. The next prime is 2564512871. The reversal of 2564512855 is 5582154652.

It is a cyclic number.

It is not a de Polignac number, because 2564512855 - 2²¹ = 2562415703 is a prime.

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, 140601 + ... + 157789.

It is an arithmetic number, because the mean of its divisors is an integer number (196326990).

Almost surely, 2^2564512855 is an apocalyptic number.

2564512855 is a deficient number, since it is larger than the sum of its proper divisors (576718985).

2564512855 is a wasteful number, since it uses less digits than its factorization.

2564512855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17810.

The product of its digits is 480000, while the sum is 43.

The square root of 2564512855 is about 50641.0194901327. The cubic root of 2564512855 is about 1368.7841264470.

The spelling of 2564512855 in words is "two billion, five hundred sixty-four million, five hundred twelve thousand, eight hundred fifty-five".