2578774556 has 24 divisors (see below), whose sum is σ = 4664249856. Its totient is φ = 1246235760.

The previous prime is 2578774547. The next prime is 2578774571. The reversal of 2578774556 is 6554778752.

It is a congruent number.

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, 89975 + ... + 115121.

It is an arithmetic number, because the mean of its divisors is an integer number (194343744).

Almost surely, 2^2578774556 is an apocalyptic number.

It is an amenable number.

2578774556 is a deficient number, since it is larger than the sum of its proper divisors (2085475300).

2578774556 is a wasteful number, since it uses less digits than its factorization.

2578774556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26009 (or 26007 counting only the distinct ones).

The product of its digits is 16464000, while the sum is 56.

The square root of 2578774556 is about 50781.6360114560. The cubic root of 2578774556 is about 1371.3167860626.

The spelling of 2578774556 in words is "two billion, five hundred seventy-eight million, seven hundred seventy-four thousand, five hundred fifty-six".