27731842337 has 4 divisors (see below), whose sum is σ = 27732176196. Its totient is φ = 27731508480.

The previous prime is 27731842319. The next prime is 27731842339. The reversal of 27731842337 is 73324813772.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 18469897216 + 9261945121 = 135904^2 + 96239^2 .

It is a cyclic number.

It is not a de Polignac number, because 27731842337 - 2⁶ = 27731842273 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27731842291 and 27731842300.

It is not an unprimeable number, because it can be changed into a prime (27731842339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66137 + ... + 244617.

It is an arithmetic number, because the mean of its divisors is an integer number (6933044049).

Almost surely, 2^27731842337 is an apocalyptic number.

It is an amenable number.

27731842337 is a deficient number, since it is larger than the sum of its proper divisors (333859).

27731842337 is a wasteful number, since it uses less digits than its factorization.

27731842337 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333858.

The product of its digits is 1185408, while the sum is 47.

The spelling of 27731842337 in words is "twenty-seven billion, seven hundred thirty-one million, eight hundred forty-two thousand, three hundred thirty-seven".