27143432105 has 4 divisors (see below), whose sum is σ = 32572118532. Its totient is φ = 21714745680.

The previous prime is 27143432081. The next prime is 27143432189. The reversal of 27143432105 is 50123434172.

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 21086234521 + 6057197584 = 145211^2 + 77828^2 .

It is not a de Polignac number, because 27143432105 - 2⁸ = 27143431849 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2714343206 + ... + 2714343215.

It is an arithmetic number, because the mean of its divisors is an integer number (8143029633).

Almost surely, 2^27143432105 is an apocalyptic number.

It is an amenable number.

27143432105 is a deficient number, since it is larger than the sum of its proper divisors (5428686427).

27143432105 is an equidigital number, since it uses as much as digits as its factorization.

27143432105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5428686426.

The product of its (nonzero) digits is 20160, while the sum is 32.

Adding to 27143432105 its reverse (50123434172), we get a palindrome (77266866277).

The spelling of 27143432105 in words is "twenty-seven billion, one hundred forty-three million, four hundred thirty-two thousand, one hundred five".