27643920646 has 8 divisors (see below), whose sum is σ = 41466673584. Its totient is φ = 13821696120.

The previous prime is 27643920631. The next prime is 27643920671. The reversal of 27643920646 is 64602934672.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 27643920646.

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 47551 + ... + 239893.

It is an arithmetic number, because the mean of its divisors is an integer number (5183334198).

Almost surely, 2^27643920646 is an apocalyptic number.

27643920646 is a deficient number, since it is larger than the sum of its proper divisors (13822752938).

27643920646 is a wasteful number, since it uses less digits than its factorization.

27643920646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264206.

The product of its (nonzero) digits is 2612736, while the sum is 49.

The spelling of 27643920646 in words is "twenty-seven billion, six hundred forty-three million, nine hundred twenty thousand, six hundred forty-six".