27831330145 has 4 divisors (see below), whose sum is σ = 33397596180. Its totient is φ = 22265064112.

The previous prime is 27831330143. The next prime is 27831330151. The reversal of 27831330145 is 54103313872.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6584186449 + 21247143696 = 81143^2 + 145764^2 .

It is a cyclic number.

It is not a de Polignac number, because 27831330145 - 2¹ = 27831330143 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27831330143) 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, 2783133010 + ... + 2783133019.

It is an arithmetic number, because the mean of its divisors is an integer number (8349399045).

Almost surely, 2^27831330145 is an apocalyptic number.

It is an amenable number.

27831330145 is a deficient number, since it is larger than the sum of its proper divisors (5566266035).

27831330145 is an equidigital number, since it uses as much as digits as its factorization.

27831330145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5566266034.

The product of its (nonzero) digits is 60480, while the sum is 37.

The spelling of 27831330145 in words is "twenty-seven billion, eight hundred thirty-one million, three hundred thirty thousand, one hundred forty-five".