28027527757181 has 2 divisors, whose sum is σ = 28027527757182. Its totient is φ = 28027527757180.

The previous prime is 28027527757157. The next prime is 28027527757301. The reversal of 28027527757181 is 18175772572082.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22820158932025 + 5207368825156 = 4777045^2 + 2281966^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28027527757181 is a prime.

It is a super-2 number, since 2×28027527757181² (a number of 28 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28027527757111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14013763878590 + 14013763878591.

It is an arithmetic number, because the mean of its divisors is an integer number (14013763878591).

Almost surely, 2^{28027527757181} is an apocalyptic number.

It is an amenable number.

28027527757181 is a deficient number, since it is larger than the sum of its proper divisors (1).

28027527757181 is an equidigital number, since it uses as much as digits as its factorization.

28027527757181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30732800, while the sum is 62.

The spelling of 28027527757181 in words is "twenty-eight trillion, twenty-seven billion, five hundred twenty-seven million, seven hundred fifty-seven thousand, one hundred eighty-one".