27642653768 has 8 divisors (see below), whose sum is σ = 51829975830. Its totient is φ = 13821326880.

The previous prime is 27642653749. The next prime is 27642653771. The reversal of 27642653768 is 86735624672.

It can be written as a sum of positive squares in only one way, i.e., 23299580164 + 4343073604 = 152642^2 + 65902^2 .

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 (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1727665853 + ... + 1727665868.

Almost surely, 2^27642653768 is an apocalyptic number.

It is an amenable number.

27642653768 is a deficient number, since it is larger than the sum of its proper divisors (24187322062).

27642653768 is a wasteful number, since it uses less digits than its factorization.

27642653768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3455331727 (or 3455331723 counting only the distinct ones).

The product of its digits is 20321280, while the sum is 56.

The spelling of 27642653768 in words is "twenty-seven billion, six hundred forty-two million, six hundred fifty-three thousand, seven hundred sixty-eight".