27664071612 has 12 divisors (see below), whose sum is σ = 64549500456. Its totient is φ = 9221357200.

The previous prime is 27664071577. The next prime is 27664071619. The reversal of 27664071612 is 21617046672.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27664071619) 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 3 ways as a sum of consecutive naturals, for example, 1152669639 + ... + 1152669662.

It is an arithmetic number, because the mean of its divisors is an integer number (5379125038).

Almost surely, 2^27664071612 is an apocalyptic number.

It is an amenable number.

27664071612 is an abundant number, since it is smaller than the sum of its proper divisors (36885428844).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

27664071612 is a wasteful number, since it uses less digits than its factorization.

27664071612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2305339308 (or 2305339306 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 42.

The spelling of 27664071612 in words is "twenty-seven billion, six hundred sixty-four million, seventy-one thousand, six hundred twelve".