2556241847 has 4 divisors (see below), whose sum is σ = 2599568040. Its totient is φ = 2512915656.

The previous prime is 2556241843. The next prime is 2556241901. The reversal of 2556241847 is 7481426552.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2556241847 - 2² = 2556241843 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2556241798 and 2556241807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2556241841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21663008 + ... + 21663125.

It is an arithmetic number, because the mean of its divisors is an integer number (649892010).

Almost surely, 2^2556241847 is an apocalyptic number.

2556241847 is a deficient number, since it is larger than the sum of its proper divisors (43326193).

2556241847 is an equidigital number, since it uses as much as digits as its factorization.

2556241847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43326192.

The product of its digits is 537600, while the sum is 44.

The square root of 2556241847 is about 50559.2904123466. The cubic root of 2556241847 is about 1367.3110179153.

The spelling of 2556241847 in words is "two billion, five hundred fifty-six million, two hundred forty-one thousand, eight hundred forty-seven".