2556726578223 has 4 divisors (see below), whose sum is σ = 3408968770968. Its totient is φ = 1704484385480.

The previous prime is 2556726578209. The next prime is 2556726578249. The reversal of 2556726578223 is 3228756276552.

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 2556726578223 - 2⁹ = 2556726577711 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2556726678223) 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, 426121096368 + ... + 426121096373.

It is an arithmetic number, because the mean of its divisors is an integer number (852242192742).

Almost surely, 2^{2556726578223} is an apocalyptic number.

2556726578223 is a deficient number, since it is larger than the sum of its proper divisors (852242192745).

2556726578223 is an equidigital number, since it uses as much as digits as its factorization.

2556726578223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 852242192744.

The product of its digits is 84672000, while the sum is 60.

The spelling of 2556726578223 in words is "two trillion, five hundred fifty-six billion, seven hundred twenty-six million, five hundred seventy-eight thousand, two hundred twenty-three".