27727140638 has 16 divisors (see below), whose sum is σ = 42143688720. Its totient is φ = 13680326016.

The previous prime is 27727140631. The next prime is 27727140647. The reversal of 27727140638 is 83604172772.

It is a junction number, because it is equal to n+sod(n) for n = 27727140592 and 27727140601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27727140631) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 218933 + ... + 321536.

It is an arithmetic number, because the mean of its divisors is an integer number (2633980545).

Almost surely, 2^27727140638 is an apocalyptic number.

27727140638 is a deficient number, since it is larger than the sum of its proper divisors (14416548082).

27727140638 is a wasteful number, since it uses less digits than its factorization.

27727140638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540811.

The product of its (nonzero) digits is 790272, while the sum is 47.

The spelling of 27727140638 in words is "twenty-seven billion, seven hundred twenty-seven million, one hundred forty thousand, six hundred thirty-eight".