27561061063 has 2 divisors, whose sum is σ = 27561061064. Its totient is φ = 27561061062.

The previous prime is 27561061061. The next prime is 27561061081. The reversal of 27561061063 is 36016016572.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27561061063 - 2¹ = 27561061061 is a prime.

It is a super-2 number, since 2×27561061063² (a number of 22 digits) contains 22 as substring.

Together with 27561061061, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27561061061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13780530531 + 13780530532.

It is an arithmetic number, because the mean of its divisors is an integer number (13780530532).

Almost surely, 2^27561061063 is an apocalyptic number.

27561061063 is a deficient number, since it is larger than the sum of its proper divisors (1).

27561061063 is an equidigital number, since it uses as much as digits as its factorization.

27561061063 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 37.

The spelling of 27561061063 in words is "twenty-seven billion, five hundred sixty-one million, sixty-one thousand, sixty-three".