27482578638 has 16 divisors (see below), whose sum is σ = 55040152656. Its totient is φ = 9148360320.

The previous prime is 27482578619. The next prime is 27482578681. The reversal of 27482578638 is 83687528472.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3120043 + ... + 3128838.

It is an arithmetic number, because the mean of its divisors is an integer number (3440009541).

Almost surely, 2^27482578638 is an apocalyptic number.

27482578638 is an abundant number, since it is smaller than the sum of its proper divisors (27557574018).

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

27482578638 is a wasteful number, since it uses less digits than its factorization.

27482578638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6249619.

The product of its digits is 36126720, while the sum is 60.

The spelling of 27482578638 in words is "twenty-seven billion, four hundred eighty-two million, five hundred seventy-eight thousand, six hundred thirty-eight".