27047436869 has 2 divisors, whose sum is σ = 27047436870. Its totient is φ = 27047436868.

The previous prime is 27047436827. The next prime is 27047436877. The reversal of 27047436869 is 96863474072.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25580163844 + 1467273025 = 159938^2 + 38305^2 .

It is a cyclic number.

It is not a de Polignac number, because 27047436869 - 2⁸ = 27047436613 is a prime.

It is a super-2 number, since 2×27047436869² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27047436469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13523718434 + 13523718435.

It is an arithmetic number, because the mean of its divisors is an integer number (13523718435).

Almost surely, 2^27047436869 is an apocalyptic number.

It is an amenable number.

27047436869 is a deficient number, since it is larger than the sum of its proper divisors (1).

27047436869 is an equidigital number, since it uses as much as digits as its factorization.

27047436869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12192768, while the sum is 56.

The spelling of 27047436869 in words is "twenty-seven billion, forty-seven million, four hundred thirty-six thousand, eight hundred sixty-nine".