27649238399 has 4 divisors (see below), whose sum is σ = 27649666200. Its totient is φ = 27648810600.

The previous prime is 27649238371. The next prime is 27649238417. The reversal of 27649238399 is 99383294672.

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 27649238399 - 2¹² = 27649234303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27649231399) 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 3 ways as a sum of consecutive naturals, for example, 94877 + ... + 253574.

It is an arithmetic number, because the mean of its divisors is an integer number (6912416550).

Almost surely, 2^27649238399 is an apocalyptic number.

27649238399 is a deficient number, since it is larger than the sum of its proper divisors (427801).

27649238399 is an equidigital number, since it uses as much as digits as its factorization.

27649238399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427800.

The product of its digits is 35271936, while the sum is 62.

The spelling of 27649238399 in words is "twenty-seven billion, six hundred forty-nine million, two hundred thirty-eight thousand, three hundred ninety-nine".