27440021137 has 2 divisors, whose sum is σ = 27440021138. Its totient is φ = 27440021136.

The previous prime is 27440021111. The next prime is 27440021159. The reversal of 27440021137 is 73112004472.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24141701376 + 3298319761 = 155376^2 + 57431^2 .

It is a cyclic number.

It is not a de Polignac number, because 27440021137 - 2¹⁹ = 27439496849 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 27440021099 and 27440021108.

It is not a weakly prime, because it can be changed into another prime (27440021737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13720010568 + 13720010569.

It is an arithmetic number, because the mean of its divisors is an integer number (13720010569).

Almost surely, 2^27440021137 is an apocalyptic number.

It is an amenable number.

27440021137 is a deficient number, since it is larger than the sum of its proper divisors (1).

27440021137 is an equidigital number, since it uses as much as digits as its factorization.

27440021137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9408, while the sum is 31.

The spelling of 27440021137 in words is "twenty-seven billion, four hundred forty million, twenty-one thousand, one hundred thirty-seven".