27205605045 has 12 divisors (see below), whose sum is σ = 47156382156. Its totient is φ = 14509656000.

The previous prime is 27205605041. The next prime is 27205605047. The reversal of 27205605045 is 54050650272.

27205605045 is a `hidden beast` number, since 2 + 7 + 2 + 0 + 5 + 605 + 0 + 45 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 19054765521 + 8150839524 = 138039^2 + 90282^2 .

It is not a de Polignac number, because 27205605045 - 2² = 27205605041 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27205605041) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 302284456 + ... + 302284545.

It is an arithmetic number, because the mean of its divisors is an integer number (3929698513).

Almost surely, 2^27205605045 is an apocalyptic number.

It is an amenable number.

27205605045 is a deficient number, since it is larger than the sum of its proper divisors (19950777111).

27205605045 is a wasteful number, since it uses less digits than its factorization.

27205605045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 604569012 (or 604569009 counting only the distinct ones).

The product of its (nonzero) digits is 84000, while the sum is 36.

It can be divided in two parts, 27205 and 605045, that added together give a triangular number (632250 = T₁₁₂₄).

The spelling of 27205605045 in words is "twenty-seven billion, two hundred five million, six hundred five thousand, forty-five".