27693218505 has 64 divisors (see below), whose sum is σ = 47038537728. Its totient is φ = 13894237440.

The previous prime is 27693218479. The next prime is 27693218507. The reversal of 27693218505 is 50581239672.

It is not a de Polignac number, because 27693218505 - 2¹¹ = 27693216457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27693218507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2158660 + ... + 2171450.

It is an arithmetic number, because the mean of its divisors is an integer number (734977152).

Almost surely, 2^27693218505 is an apocalyptic number.

It is an amenable number.

27693218505 is a deficient number, since it is larger than the sum of its proper divisors (19345319223).

27693218505 is a wasteful number, since it uses less digits than its factorization.

27693218505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12966.

The product of its (nonzero) digits is 907200, while the sum is 48.

The spelling of 27693218505 in words is "twenty-seven billion, six hundred ninety-three million, two hundred eighteen thousand, five hundred five".