27074438981 has 2 divisors, whose sum is σ = 27074438982. Its totient is φ = 27074438980.

The previous prime is 27074438959. The next prime is 27074438999. The reversal of 27074438981 is 18983447072.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13564096225 + 13510342756 = 116465^2 + 116234^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27074438981 is a prime.

It is a super-2 number, since 2×27074438981² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27074438681) 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 as a sum of consecutive naturals, namely, 13537219490 + 13537219491.

It is an arithmetic number, because the mean of its divisors is an integer number (13537219491).

Almost surely, 2^27074438981 is an apocalyptic number.

It is an amenable number.

27074438981 is a deficient number, since it is larger than the sum of its proper divisors (1).

27074438981 is an equidigital number, since it uses as much as digits as its factorization.

27074438981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2709504, while the sum is 53.

The spelling of 27074438981 in words is "twenty-seven billion, seventy-four million, four hundred thirty-eight thousand, nine hundred eighty-one".