27138128199 has 48 divisors (see below), whose sum is σ = 45660934368. Its totient is φ = 14209993728.

The previous prime is 27138128197. The next prime is 27138128257. The reversal of 27138128199 is 99182183172.

It is not a de Polignac number, because 27138128199 - 2¹ = 27138128197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27138128197) 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 47 ways as a sum of consecutive naturals, for example, 209979 + ... + 313635.

It is an arithmetic number, because the mean of its divisors is an integer number (951269466).

Almost surely, 2^27138128199 is an apocalyptic number.

27138128199 is a deficient number, since it is larger than the sum of its proper divisors (18522806169).

27138128199 is a wasteful number, since it uses less digits than its factorization.

27138128199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103824 (or 103817 counting only the distinct ones).

The product of its digits is 435456, while the sum is 51.

The spelling of 27138128199 in words is "twenty-seven billion, one hundred thirty-eight million, one hundred twenty-eight thousand, one hundred ninety-nine".