27436211921 has 2 divisors, whose sum is σ = 27436211922. Its totient is φ = 27436211920.

The previous prime is 27436211903. The next prime is 27436211927. The reversal of 27436211921 is 12911263472.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25985440000 + 1450771921 = 161200^2 + 38089^2 .

It is a cyclic number.

It is not a de Polignac number, because 27436211921 - 2⁶ = 27436211857 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (27436211927) 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, 13718105960 + 13718105961.

It is an arithmetic number, because the mean of its divisors is an integer number (13718105961).

Almost surely, 2^27436211921 is an apocalyptic number.

It is an amenable number.

27436211921 is a deficient number, since it is larger than the sum of its proper divisors (1).

27436211921 is an equidigital number, since it uses as much as digits as its factorization.

27436211921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 38.

The spelling of 27436211921 in words is "twenty-seven billion, four hundred thirty-six million, two hundred eleven thousand, nine hundred twenty-one".