27778944444 has 48 divisors (see below), whose sum is σ = 67126993920. Its totient is φ = 8930434240.

The previous prime is 27778944359. The next prime is 27778944491. The reversal of 27778944444 is 44444987772.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 273217 + ... + 360839.

It is an arithmetic number, because the mean of its divisors is an integer number (1398479040).

Almost surely, 2^27778944444 is an apocalyptic number.

It is an amenable number.

27778944444 is an abundant number, since it is smaller than the sum of its proper divisors (39348049476).

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

27778944444 is a wasteful number, since it uses less digits than its factorization.

27778944444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88570 (or 88568 counting only the distinct ones).

The product of its digits is 50577408, while the sum is 60.

The spelling of 27778944444 in words is "twenty-seven billion, seven hundred seventy-eight million, nine hundred forty-four thousand, four hundred forty-four".