27755366505 has 32 divisors (see below), whose sum is σ = 45270171648. Its totient is φ = 14517854400.

The previous prime is 27755366473. The next prime is 27755366531. The reversal of 27755366505 is 50566355772.

It is not a de Polignac number, because 27755366505 - 2⁵ = 27755366473 is a prime.

It is a super-3 number, since 3×27755366505³ (a number of 32 digits) contains 333 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 135192 + ... + 271638.

It is an arithmetic number, because the mean of its divisors is an integer number (1414692864).

Almost surely, 2^27755366505 is an apocalyptic number.

It is an amenable number.

27755366505 is a deficient number, since it is larger than the sum of its proper divisors (17514805143).

27755366505 is a wasteful number, since it uses less digits than its factorization.

27755366505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136717.

The product of its (nonzero) digits is 6615000, while the sum is 51.

The spelling of 27755366505 in words is "twenty-seven billion, seven hundred fifty-five million, three hundred sixty-six thousand, five hundred five".