2556041513 has 4 divisors (see below), whose sum is σ = 2564260608. Its totient is φ = 2547822420.

The previous prime is 2556041503. The next prime is 2556041531. The reversal of 2556041513 is 3151406552.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2556041513 - 2²² = 2551847209 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2556041513.

It is not an unprimeable number, because it can be changed into a prime (2556041503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4109081 + ... + 4109702.

It is an arithmetic number, because the mean of its divisors is an integer number (641065152).

Almost surely, 2^2556041513 is an apocalyptic number.

It is an amenable number.

2556041513 is a deficient number, since it is larger than the sum of its proper divisors (8219095).

2556041513 is an equidigital number, since it uses as much as digits as its factorization.

2556041513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8219094.

The product of its (nonzero) digits is 18000, while the sum is 32.

The square root of 2556041513 is about 50557.3091946160. The cubic root of 2556041513 is about 1367.2752980242.

The spelling of 2556041513 in words is "two billion, five hundred fifty-six million, forty-one thousand, five hundred thirteen".