27725361647 has 2 divisors, whose sum is σ = 27725361648. Its totient is φ = 27725361646.

The previous prime is 27725361607. The next prime is 27725361649. The reversal of 27725361647 is 74616352772.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27725361647 - 2¹⁰ = 27725360623 is a prime.

Together with 27725361649, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 27725361595 and 27725361604.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27725361649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13862680823 + 13862680824.

It is an arithmetic number, because the mean of its divisors is an integer number (13862680824).

Almost surely, 2^27725361647 is an apocalyptic number.

27725361647 is a deficient number, since it is larger than the sum of its proper divisors (1).

27725361647 is an equidigital number, since it uses as much as digits as its factorization.

27725361647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2963520, while the sum is 50.

The spelling of 27725361647 in words is "twenty-seven billion, seven hundred twenty-five million, three hundred sixty-one thousand, six hundred forty-seven".