27043157849 has 2 divisors, whose sum is σ = 27043157850. Its totient is φ = 27043157848.

The previous prime is 27043157797. The next prime is 27043157863. The reversal of 27043157849 is 94875134072.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23190721225 + 3852436624 = 152285^2 + 62068^2 .

It is a cyclic number.

It is not a de Polignac number, because 27043157849 - 2²⁰ = 27042109273 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 27043157797 and 27043157806.

It is not a weakly prime, because it can be changed into another prime (27043157899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13521578924 + 13521578925.

It is an arithmetic number, because the mean of its divisors is an integer number (13521578925).

Almost surely, 2^27043157849 is an apocalyptic number.

It is an amenable number.

27043157849 is a deficient number, since it is larger than the sum of its proper divisors (1).

27043157849 is an equidigital number, since it uses as much as digits as its factorization.

27043157849 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1693440, while the sum is 50.

The spelling of 27043157849 in words is "twenty-seven billion, forty-three million, one hundred fifty-seven thousand, eight hundred forty-nine".