2556566013 has 8 divisors (see below), whose sum is σ = 3409102528. Its totient is φ = 1704203424.

The previous prime is 2556566011. The next prime is 2556566027. The reversal of 2556566013 is 3106656552.

2556566013 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2556566013 - 2¹ = 2556566011 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2556566011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4081 + ... + 71622.

It is an arithmetic number, because the mean of its divisors is an integer number (426137816).

Almost surely, 2^2556566013 is an apocalyptic number.

It is an amenable number.

2556566013 is a deficient number, since it is larger than the sum of its proper divisors (852536515).

2556566013 is a wasteful number, since it uses less digits than its factorization.

2556566013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86963.

The product of its (nonzero) digits is 162000, while the sum is 39.

The square root of 2556566013 is about 50562.4961112483. The cubic root of 2556566013 is about 1367.3688133086.

The spelling of 2556566013 in words is "two billion, five hundred fifty-six million, five hundred sixty-six thousand, thirteen".