27873812873 has 4 divisors (see below), whose sum is σ = 27875093268. Its totient is φ = 27872532480.

The previous prime is 27873812851. The next prime is 27873812899. The reversal of 27873812873 is 37821837872.

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 16250385529 + 11623427344 = 127477^2 + 107812^2 .

It is a cyclic number.

It is not a de Polignac number, because 27873812873 - 2¹² = 27873808777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27873812803) 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, 606968 + ... + 651273.

It is an arithmetic number, because the mean of its divisors is an integer number (6968773317).

Almost surely, 2^27873812873 is an apocalyptic number.

It is an amenable number.

27873812873 is a deficient number, since it is larger than the sum of its proper divisors (1280395).

27873812873 is a wasteful number, since it uses less digits than its factorization.

27873812873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1280394.

The product of its digits is 6322176, while the sum is 56.

The spelling of 27873812873 in words is "twenty-seven billion, eight hundred seventy-three million, eight hundred twelve thousand, eight hundred seventy-three".