2556726578277 has 8 divisors (see below), whose sum is σ = 3408976344864. Its totient is φ = 1704480598608.

The previous prime is 2556726578249. The next prime is 2556726578279. The reversal of 2556726578277 is 7728756276552.

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

It is not a de Polignac number, because 2556726578277 - 2¹⁵ = 2556726545509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2556726578279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1632223 + ... + 2788835.

It is an arithmetic number, because the mean of its divisors is an integer number (426122043108).

Almost surely, 2^{2556726578277} is an apocalyptic number.

It is an amenable number.

2556726578277 is a deficient number, since it is larger than the sum of its proper divisors (852249766587).

2556726578277 is a wasteful number, since it uses less digits than its factorization.

2556726578277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1893459.

The product of its digits is 691488000, while the sum is 69.

The spelling of 2556726578277 in words is "two trillion, five hundred fifty-six billion, seven hundred twenty-six million, five hundred seventy-eight thousand, two hundred seventy-seven".