27606563189 has 2 divisors, whose sum is σ = 27606563190. Its totient is φ = 27606563188.

The previous prime is 27606563147. The next prime is 27606563249. The reversal of 27606563189 is 98136560672.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26360120164 + 1246443025 = 162358^2 + 35305^2 .

It is a cyclic number.

It is not a de Polignac number, because 27606563189 - 2⁸ = 27606562933 is a prime.

It is a super-2 number, since 2×27606563189² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 27606563189.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27606563689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13803281594 + 13803281595.

It is an arithmetic number, because the mean of its divisors is an integer number (13803281595).

Almost surely, 2^27606563189 is an apocalyptic number.

It is an amenable number.

27606563189 is a deficient number, since it is larger than the sum of its proper divisors (1).

27606563189 is an equidigital number, since it uses as much as digits as its factorization.

27606563189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3265920, while the sum is 53.

The spelling of 27606563189 in words is "twenty-seven billion, six hundred six million, five hundred sixty-three thousand, one hundred eighty-nine".