27638240679 has 12 divisors (see below), whose sum is σ = 45625032336. Its totient is φ = 15793280352.

The previous prime is 27638240657. The next prime is 27638240683. The reversal of 27638240679 is 97604283672.

It is not a de Polignac number, because 27638240679 - 2¹² = 27638236583 is a prime.

It is a super-3 number, since 3×27638240679³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27638240639) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 219351054 + ... + 219351179.

It is an arithmetic number, because the mean of its divisors is an integer number (3802086028).

Almost surely, 2^27638240679 is an apocalyptic number.

27638240679 is a deficient number, since it is larger than the sum of its proper divisors (17986791657).

27638240679 is a wasteful number, since it uses less digits than its factorization.

27638240679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438702246 (or 438702243 counting only the distinct ones).

The product of its (nonzero) digits is 6096384, while the sum is 54.

The spelling of 27638240679 in words is "twenty-seven billion, six hundred thirty-eight million, two hundred forty thousand, six hundred seventy-nine".