27881145524885 has 8 divisors (see below), whose sum is σ = 33541650135096. Its totient is φ = 22248732749760.

The previous prime is 27881145524849. The next prime is 27881145524909. The reversal of 27881145524885 is 58842554118872.

It can be written as a sum of positive squares in 4 ways, for example, as 5206615803601 + 22674529721284 = 2281801^2 + 4761778^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 27881145524885 - 2⁸ = 27881145524629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7022956586 + ... + 7022960555.

It is an arithmetic number, because the mean of its divisors is an integer number (4192706266887).

Almost surely, 2^{27881145524885} is an apocalyptic number.

It is an amenable number.

27881145524885 is a deficient number, since it is larger than the sum of its proper divisors (5660504610211).

27881145524885 is a wasteful number, since it uses less digits than its factorization.

27881145524885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14045917543.

The product of its digits is 229376000, while the sum is 68.

The spelling of 27881145524885 in words is "twenty-seven trillion, eight hundred eighty-one billion, one hundred forty-five million, five hundred twenty-four thousand, eight hundred eighty-five".