27680481644 has 6 divisors (see below), whose sum is σ = 48440842884. Its totient is φ = 13840240820.

The previous prime is 27680481611. The next prime is 27680481691. The reversal of 27680481644 is 44618408672.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 27680481592 and 27680481601.

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, 3460060202 + ... + 3460060209.

It is an arithmetic number, because the mean of its divisors is an integer number (8073473814).

Almost surely, 2^27680481644 is an apocalyptic number.

It is an amenable number.

27680481644 is a deficient number, since it is larger than the sum of its proper divisors (20760361240).

27680481644 is a wasteful number, since it uses less digits than its factorization.

27680481644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6920120415 (or 6920120413 counting only the distinct ones).

The product of its (nonzero) digits is 2064384, while the sum is 50.

The spelling of 27680481644 in words is "twenty-seven billion, six hundred eighty million, four hundred eighty-one thousand, six hundred forty-four".