2556553650641 has 4 divisors (see below), whose sum is σ = 2562247534500. Its totient is φ = 2550859766784.

The previous prime is 2556553650617. The next prime is 2556553650661. The reversal of 2556553650641 is 1460563556552.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 945748470016 + 1610805180625 = 972496^2 + 1269175^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2556553650641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2556553650661) 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, 2846941256 + ... + 2846942153.

It is an arithmetic number, because the mean of its divisors is an integer number (640561883625).

Almost surely, 2^{2556553650641} is an apocalyptic number.

It is an amenable number.

2556553650641 is a deficient number, since it is larger than the sum of its proper divisors (5693883859).

2556553650641 is an equidigital number, since it uses as much as digits as its factorization.

2556553650641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5693883858.

The product of its (nonzero) digits is 16200000, while the sum is 53.

The spelling of 2556553650641 in words is "two trillion, five hundred fifty-six billion, five hundred fifty-three million, six hundred fifty thousand, six hundred forty-one".