27705306537 has 12 divisors (see below), whose sum is σ = 40055270580. Its totient is φ = 18453360768.

The previous prime is 27705306481. The next prime is 27705306539. The reversal of 27705306537 is 73560350772.

27705306537 is a `hidden beast` number, since 27 + 7 + 0 + 530 + 65 + 37 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 13039127721 + 14666178816 = 114189^2 + 121104^2 .

It is not a de Polignac number, because 27705306537 - 2¹¹ = 27705304489 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 27705306492 and 27705306501.

It is not an unprimeable number, because it can be changed into a prime (27705306539) 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, 1393212 + ... + 1412957.

It is an arithmetic number, because the mean of its divisors is an integer number (3337939215).

Almost surely, 2^27705306537 is an apocalyptic number.

It is an amenable number.

27705306537 is a deficient number, since it is larger than the sum of its proper divisors (12349964043).

27705306537 is a wasteful number, since it uses less digits than its factorization.

27705306537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2807272 (or 2807269 counting only the distinct ones).

The product of its (nonzero) digits is 926100, while the sum is 45.

The spelling of 27705306537 in words is "twenty-seven billion, seven hundred five million, three hundred six thousand, five hundred thirty-seven".