27471052561 has 2 divisors, whose sum is σ = 27471052562. Its totient is φ = 27471052560.

The previous prime is 27471052559. The next prime is 27471052579. The reversal of 27471052561 is 16525017472.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26295865600 + 1175186961 = 162160^2 + 34281^2 .

It is a cyclic number.

It is not a de Polignac number, because 27471052561 - 2¹ = 27471052559 is a prime.

Together with 27471052559, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (27471052261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13735526280 + 13735526281.

It is an arithmetic number, because the mean of its divisors is an integer number (13735526281).

Almost surely, 2^27471052561 is an apocalyptic number.

It is an amenable number.

27471052561 is a deficient number, since it is larger than the sum of its proper divisors (1).

27471052561 is an equidigital number, since it uses as much as digits as its factorization.

27471052561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 117600, while the sum is 40.

The spelling of 27471052561 in words is "twenty-seven billion, four hundred seventy-one million, fifty-two thousand, five hundred sixty-one".