2556042668826 has 16 divisors (see below), whose sum is σ = 5112107876928. Its totient is φ = 852010466400.

The previous prime is 2556042668807. The next prime is 2556042668831. The reversal of 2556042668826 is 6288662406552.

It is a self number, because there is not a number n which added to its sum of digits gives 2556042668826.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 776091 + ... + 2390481.

It is an arithmetic number, because the mean of its divisors is an integer number (319506742308).

Almost surely, 2^{2556042668826} is an apocalyptic number.

2556042668826 is an abundant number, since it is smaller than the sum of its proper divisors (2556065208102).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2556042668826 is a wasteful number, since it uses less digits than its factorization.

2556042668826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1878277.

The product of its (nonzero) digits is 66355200, while the sum is 60.

The spelling of 2556042668826 in words is "two trillion, five hundred fifty-six billion, forty-two million, six hundred sixty-eight thousand, eight hundred twenty-six".