27871304787013 has 4 divisors (see below), whose sum is σ = 27877609090188. Its totient is φ = 27865000483840.

The previous prime is 27871304786989. The next prime is 27871304787143. The reversal of 27871304787013 is 31078740317872.

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 24943212285124 + 2928092501889 = 4994318^2 + 1711167^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27871304787013 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27871304781013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3152144956 + ... + 3152153797.

It is an arithmetic number, because the mean of its divisors is an integer number (6969402272547).

Almost surely, 2^{27871304787013} is an apocalyptic number.

It is an amenable number.

27871304787013 is a deficient number, since it is larger than the sum of its proper divisors (6304303175).

27871304787013 is an equidigital number, since it uses as much as digits as its factorization.

27871304787013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6304303174.

The product of its (nonzero) digits is 11063808, while the sum is 58.

The spelling of 27871304787013 in words is "twenty-seven trillion, eight hundred seventy-one billion, three hundred four million, seven hundred eighty-seven thousand, thirteen".