27748651607 has 4 divisors (see below), whose sum is σ = 27837305760. Its totient is φ = 27659997456.

The previous prime is 27748651573. The next prime is 27748651627. The reversal of 27748651607 is 70615684772.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 27748651607 - 2⁶ = 27748651543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27748651627) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44326607 + ... + 44327232.

It is an arithmetic number, because the mean of its divisors is an integer number (6959326440).

Almost surely, 2^27748651607 is an apocalyptic number.

27748651607 is a deficient number, since it is larger than the sum of its proper divisors (88654153).

27748651607 is an equidigital number, since it uses as much as digits as its factorization.

27748651607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88654152.

The product of its (nonzero) digits is 3951360, while the sum is 53.

The spelling of 27748651607 in words is "twenty-seven billion, seven hundred forty-eight million, six hundred fifty-one thousand, six hundred seven".