27481640437 has 2 divisors, whose sum is σ = 27481640438. Its totient is φ = 27481640436.

The previous prime is 27481640419. The next prime is 27481640447. The reversal of 27481640437 is 73404618472.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16931474641 + 10550165796 = 130121^2 + 102714^2 .

It is a cyclic number.

It is not a de Polignac number, because 27481640437 - 2¹⁹ = 27481116149 is a prime.

It is a super-2 number, since 2×27481640437² (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 (27481640447) 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, 13740820218 + 13740820219.

It is an arithmetic number, because the mean of its divisors is an integer number (13740820219).

Almost surely, 2^27481640437 is an apocalyptic number.

It is an amenable number.

27481640437 is a deficient number, since it is larger than the sum of its proper divisors (1).

27481640437 is an equidigital number, since it uses as much as digits as its factorization.

27481640437 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 903168, while the sum is 46.

The spelling of 27481640437 in words is "twenty-seven billion, four hundred eighty-one million, six hundred forty thousand, four hundred thirty-seven".