27690505064 has 8 divisors (see below), whose sum is σ = 51919697010. Its totient is φ = 13845252528.

The previous prime is 27690505013. The next prime is 27690505091. The reversal of 27690505064 is 46050509672.

It can be written as a sum of positive squares in only one way, i.e., 18733396900 + 8957108164 = 136870^2 + 94642^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 1730656559 + ... + 1730656574.

Almost surely, 2^27690505064 is an apocalyptic number.

It is an amenable number.

27690505064 is a deficient number, since it is larger than the sum of its proper divisors (24229191946).

27690505064 is a wasteful number, since it uses less digits than its factorization.

27690505064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3461313139 (or 3461313135 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 44.

The spelling of 27690505064 in words is "twenty-seven billion, six hundred ninety million, five hundred five thousand, sixty-four".