27755732709 has 12 divisors (see below), whose sum is σ = 40099975552. Its totient is φ = 18499962600.

The previous prime is 27755732623. The next prime is 27755732729. The reversal of 27755732709 is 90723755772.

It is not a de Polignac number, because 27755732709 - 2¹² = 27755728613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27755732729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 275707 + ... + 362664.

Almost surely, 2^27755732709 is an apocalyptic number.

It is an amenable number.

27755732709 is a deficient number, since it is larger than the sum of its proper divisors (12344242843).

27755732709 is a wasteful number, since it uses less digits than its factorization.

27755732709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 643208 (or 643205 counting only the distinct ones).

The product of its (nonzero) digits is 6482700, while the sum is 54.

The spelling of 27755732709 in words is "twenty-seven billion, seven hundred fifty-five million, seven hundred thirty-two thousand, seven hundred nine".