27738681319 has 4 divisors (see below), whose sum is σ = 28208828520. Its totient is φ = 27268534120.

The previous prime is 27738681307. The next prime is 27738681349. The reversal of 27738681319 is 91318683772.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 27738681319 - 2¹⁷ = 27738550247 is a prime.

It is a super-2 number, since 2×27738681319² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 27738681319.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27738681349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 235073512 + ... + 235073629.

It is an arithmetic number, because the mean of its divisors is an integer number (7052207130).

Almost surely, 2^27738681319 is an apocalyptic number.

27738681319 is a deficient number, since it is larger than the sum of its proper divisors (470147201).

27738681319 is an equidigital number, since it uses as much as digits as its factorization.

27738681319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 470147200.

The product of its digits is 3048192, while the sum is 55.

The spelling of 27738681319 in words is "twenty-seven billion, seven hundred thirty-eight million, six hundred eighty-one thousand, three hundred nineteen".