27856478774 has 8 divisors (see below), whose sum is σ = 41823809040. Its totient is φ = 13915209096.

The previous prime is 27856478747. The next prime is 27856478777. The reversal of 27856478774 is 47787465872.

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

It is a self number, because there is not a number n which added to its sum of digits gives 27856478774.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27856478777) 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, 6512474 + ... + 6516749.

It is an arithmetic number, because the mean of its divisors is an integer number (5227976130).

Almost surely, 2^27856478774 is an apocalyptic number.

27856478774 is a deficient number, since it is larger than the sum of its proper divisors (13967330266).

27856478774 is a wasteful number, since it uses less digits than its factorization.

27856478774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13030294.

The product of its digits is 147517440, while the sum is 65.

The spelling of 27856478774 in words is "twenty-seven billion, eight hundred fifty-six million, four hundred seventy-eight thousand, seven hundred seventy-four".